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  • Wiley-Blackwell  (120)
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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 7 (1995), S. 518-525 
    ISSN: 0899-0042
    Keywords: crystal structure ; molecular mechanics ; MM2-87 ; opioid ligand model ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The absolute configurations of the enantiomers of the opiod picenadol [cis-1,3-dimethyl-4-propyl-4-propyl-4-(3-hydroxyphenyl)piperidine; cis-3-methyl, 4-propyl] have been determined by an X-ray crystallographic study of the chloride salt of the (+)-enantiomer. The agonist (+)-enantiomer and the antagonist (-)-enantiomer were found to have the 3R, 4R and 3S, 4S absolute configurations, respectively. The conformational properties of the enantiomers were also examined with MM2-87 calculations. There was good agreement between the computed global minimum and the crystallographic structure with the phenyl ring approximately bisecting the piperidine ring by both methods. This orientation of the phenyl ring differs from that of related opioids such as the phenylmorphans, prodines, meperidine, and ketobemidone in which the phenyl ring tends to eclipse one edge of the piperidine ring. Because the phenyl ring bisects the piperidine ring in picenadol, there is little difference in the three-dimensional orientations of the phenyl rings of the two enantiomers when one superimposes the piperidine rings. The agonist (+)-enantiomer is ambiguous with respect to an opioid ligand model, which suggests that agonist activity requires a specific range of dihedral angles for the phenyl ring. While the global minimum of the agonist is not consistent with the model, a second conformer that is only 1.2 kcal/mol above the global minimum is consistent. An alternative explanation is that agonist or antagonist activity is solely due to the presence of the 3-methyl group on the different edges of the piperidine ring. MM2-87 calculations were also performed on the opioid agonist des-3-methyl analog of picenadol and the closely related trans-1,3,4-trimethyl-4-(3-hydroxyphenyl)piperidines (trans-3-methyl, 4-methyl) in which both enantiomers are opioid antagonists. The conformational properties of these compounds are consistent with the ligand model. © 1995 Wiley-Liss, Inc.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemistry - A European Journal 1 (1995), S. 118-123 
    ISSN: 0947-6539
    Keywords: antiferromagnetic exchange ; crystal structure ; indium compounds ; Jahn-Teller distortion ; titanium compounds ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Dark green crystals of In3Ti2Br9 have been synthesized from elemental Ti and molten InBr3 at 450°C. The X-ray diffractional characterization by means of single-crystal and powder Rietveld refinement reveals a hexagonal crystal structure (a = 738.2(2), c = 1813.9(3) pm; P63/mmc, Z = 2) of Cs3Cr2Cl9 type, containing Ti2Br3-9 dimers and univalent indium cations. Self-consistent, semiempirical band structure calculations show the structural distortions of the two monovalent indium cations to arise from a second-order Jahn-Teller instability. The new compound's magnetic susceptibility and microscopic antiferromagnetic exchange are analyzed by using a Bleaney-Bowers ansatz.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemistry - A European Journal 1 (1995), S. 389-393 
    ISSN: 0947-6539
    Keywords: crystal structure ; differential thermal analysis ; nitrogen oxides ; phase transitions ; twinning ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Mixtures of N2O3 and N2O4 have been prepared from measured volumes of NO and O2. Phase relationships in the system N2O3/N2O4, which depend on the composition of the samples and on the temperature, were studied by the Guinier technique and differential thermal analysis. Single crystals of phases A and B of N2O3 were grown in situ on a diffractometer and studied at temperatures between -107 and -170°C by X-ray diffraction. The structure analysis of A-N2O3 (tetragonal, space group I41/a, T = -170°C, a = 1625.57 (16), c = 880.49(13) pm, Z = 32, R1 = 0.051 for 1030 unique reflections) is hampered by twinning and additional disorder of one of two crystallographically independent molecules. B-N2O3 is nicely ordered with one molecule in the asymmetric unit (orthorhombic, space group P212121, T = -160°C, a = 506.86(4), b = 647.96(5), c = 863.26(6) pm, Z = 4, R1 = 0.023 for 1352 unique reflections). The most interesting features of the N2O3 molecule are its planarity and the extraordinarily long N—N bond (189.0(1) pm).
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemistry - A European Journal 1 (1995), S. 261-265 
    ISSN: 0947-6539
    Keywords: crystal structure ; fluorides ; hexafluorobromate(V) ; hexafluoroselenate(IV) ; naked fluoride ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1,1,3,3,5,5-Hexamethylpiperidinium fluoride (pip+F-) and 1,2-dimethylpropyltrimethylammonium fluoride have been prepared. They dissolve in fluorohydrocarbons (CH2F2, CF3-CHF-CF3, CHF3) even at very low temperatures. The nature of these solutions is indicated by the crystal structure of the adduct pip+F-·4CH2F2, which shows (C)H…F bridging. The high fluoride activity is exemplified by the previously unknown reaction between SeF5- and F- to yield SeF62-. The salt pip+BrF6- is obtained by a metathesis reaction of Cs+BrF6- with pip+F-. The distortion of the SeF62- structure from octahedral symmetry is intermediate between IF6- (strongly distorted) and BrF6- (octahedral). The electron-pair repulsion model is checked against these results.
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  • 5
    ISSN: 0947-6539
    Keywords: crystal structure ; polynuclear ; complexes ; ruthenium compounds ; supramolecular chemistry ; terpyridines ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The bridging ligand bis{4′-(2,2′:6′,2″-terpyridinyl)}ether (1) can be prepared in 69% yield from the reaction of 4′-chloro-2,2′:6′,2″-terpyridine (3) with 2,2′:6′,2″-terpyridin-4′(1′H)-one (2) in Me2NCHO in the presence of KOH. More conveniently, complexes of 1 can be prepared in situ by the reaction of 2 with a ruthenium(II) complex of 3 in the presence of K2CO3. This methodology has been developed for the synthesis of a range of mono-, di-, tri- and hexanuclear complexes with a variety of Xtpy (Xtpy = 4′-substituted 2,2′:6′,2″-terpyridine) terminator ligands. The molecular structure of 1 (a = 9.623(2), b = 11.241(1), c = 11.828(1) Å; space group P1; α = 93.064(9), β = 107.072(14), γ = 99.088(14)°; Z = 2, R = 0.0450, Rw = 0.0577) has been determined. The generality of the methodology may ultimately be limited by the sensitivity of the ether-linkage in 1 to attack by nucleophiles.
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  • 6
    Electronic Resource
    Electronic Resource
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 33 (1995), S. 611-618 
    ISSN: 0887-6266
    Keywords: elastic modulus ; crystalline regions ; cellulose triester ; crystal structure ; mechanical property ; hydrogen bond ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Elastic moduli of the crystalline regions of cellulose triesters in the direction both parallel El and perpendicular Et to the chain axis are measured by x-ray diffraction. El values for cellulose triesters are as follows: cellulose triacetate (CTA), 33.2 GPa; cellulose tripropionate (CTP), 21.6 GPa; cellulose tributyrate (CTB), 17.6 GPa; cellulose trivalerate (CTV), 17.9 Gpa. These are very small compared with that of cellulose I (134 GPa) and resemble each other despite the fact that the skeletal structure of CTP (32 helix) is much different from those of other cellulose triesters (2-fold helix). The small El values for cellulose triesters can be explained by both the large cross-sectional area of one molecule in the crystal lattice and the lack in intramolecular hydrogen bonds. Et values for cellulose triesters are as follows: CTA (310), 2.8 GPa; CTP (110), 1.4 GPa; (020), 2.1 GPa; (120), 2.2 GPa; CTB (110), 1.1 GPa. These are one of the smallest Et values already reported, and decrease with increasing the length of the side chain. Intermolecular interaction is considered to decrease with the length of acyl groups. The large Et value in the b direction of CTP reflects the dense packing of the chains in the crystal lattice. © 1995 John Wiley & Sons, Inc.
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  • 7
    Electronic Resource
    Electronic Resource
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 33 (1995), S. 1647-1651 
    ISSN: 0887-6266
    Keywords: elastic modulus ; crystalline regions ; cellulose ; crystal structure ; mechanical property ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The elastic modulus El of the crystalline regions of cellulose polymorphs in the direction parallel to the chain axis was measured by x-ray diffraction. The El values of cellulose I, II, IIII, IIIII, and IVI were 138, 88, 87, 58, 75 GPa, respectively. This indicates that the skeletons of these polymorphs are completely different from each other in the mechanical point of view. The crystal transition induces a skeletal contraction accompanied by a change in intramolecular hydrogen bonds, which is considered to result in a drastic change in the El value of the cellulose polymorphs. © 1995 John Wiley & Sons, Inc.
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  • 8
    ISSN: 0959-8103
    Keywords: poly(ethylene oxide) ; p-nitrophenol ; molecular complexes ; crystal structure ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: A crystalline complex of poly(ethylene oxide) (PEO) and p-nitrophenol (PNP) was studied by differential scanning calorimetry, X-ray diffraction, and FTIR spectroscopy, The phase diagram of this system is characterized by a peritectic reaction, and reveals the formation of a new crystal form different from those of PEO, and PNP. The triclinic unit cell of the complex was determined from the X-ray diffraction patterns of differently oriented samples obtained by mechanical deformations or spherulitic crystallizations. Finally, the molecular packing and the conformation adopted by the PEO chains were determined by FTIR spectroscopy. Polarization measurements have shown that the aromatic rings are very nearly normal to the c parameter (chain axis) and that the 1-4 axes of PNP molecules are parallel to the a* reciprocal parameter (spherulitic growth direction). Finally, a new (t2 gt2 gt3) conformation is proposed for the PEO chains on the basis of a normal mode analysis and the calculation of the intramolecular energy.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 7-13 
    ISSN: 0044-2313
    Keywords: Sodium phosphate ; oxophosphate (IV/III) ; crystal structure ; 31P-NMR ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A New Oxophosphate (IV/III) Anion - Preparation and Crystal Structure of Na6P4O10 · 2 H2OA new oxophosphate anion, P4O106-, was obtained by cleavage and simultaneous oxidation of the cyclo-hexaphosphate(III) anion in a solution of aqueous ammonia and ethanol. With sodium it forms a salt with the composition Na6P4O10 · 2 H2O. The crystal structure has been determined by single crystal X-ray diffraction (3 745 diffractometer data), the cell constants were obtained from X-ray powder data, space group P1; a = 6.004(1), b = 6.173(2), c = 11.496(2) Å, α = 99.26(2)°, β = 95.92(2)°, γ = 117.63(2)°, Z = 1, R = 0.044. The backbone of the anion is formed by phosphorus atoms directly bonded to each other. The coordination of each phosphorus atom is completed to four by oxygene. The resulting oxidation numbers are +III for the inner phosphorus atoms and +IV for the terminal phosphorus atoms. The site symmetry of the anion is approximately C2h. Based on a 31P-NMR spectra of a solution the coupling constants of the AA ‘BB’ system were determined.
    Notes: Ein neues Oxophosphation, P4O106-, wurde durch oxidative Ringspaltung an cyclo-Hexaphosphaten(III) in ammoniakalisch/ethanolischer Lösung erhalten und die Struktur von Na6P4O10 · 2 H2O [Vierkreisdiffraktometerdaten (3 745 unabhängige Strukturfaktoren)] gelöst. Raumgruppe P1; a = 6,004(1); b = 6,173(2); c = 11,496(2) Å; α = 99,26(2)° β = 95,92(2)°; γ = 117,63(2)°; Z = 1; R = 0,044. Das „Rückgrat“ des kettenförmigen Anions sind vier verbundene Phosphoratome, deren Koordination mit Sauerstoff auf vier aufgefüllt wird. Dem entspricht die Oxidationsstufe +III für die inneren bzw. +IV für die terminalen Phosphoratome. Für das komplexe Anion ist die Punktsymmetrie C2h näherungsweise erfüllt. Aus 31P-NMR-Daten in Lösung wurden die vier Kopplungskonstanten des AA ‘BB’-Systems durch Spektrensimulation ermittelt.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 177-180 
    ISSN: 0044-2313
    Keywords: Oxomanganate(VI), Rb2[MnO4] ; preparation ; crystal structure ; MAPLE calculation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A ‘Reductive Exchange Reaction’: Single Crystals of Rb2[MnO4] from Li[MnO4]By heating of well ground mixtures of the oxides RbO0.9 and Li[MnO4] (Rb:Mn = 1.5:1; Ag-tubes; 660°C, 56 d) dark-green, orthorhombic single-crystals of Rb2[MnO4] were obtained. The structural determination revealed the isotype to K2[MnO4]; a β-K2SO4-typ. Thus, for the first time by a pure solid-state-chemical way, via a reductive, complete alkali-metal exchange, single crystals of an oxomanganate(VI) of the alkali metals were prepared.The Madelung Part of the Lattice Energy, MAPLE, and the charge distribution were calculated.
    Notes: Durch Tempern inniger Gemenge der Oxide RbO0,9 und Li[MnO4] (Rb:Mn = 1,5:1; Ag-Zylinder; 660°C, 56 d) wurden dunkelgrüne, orthorhombische Einkristalle von Rb2[MnO4] erhalten. Die Einkristallstrukturbestimmung belegt die Isotypie zu K2[MnO4]; es liegt der β-K2SO4-Typ vor. Somit konnten erstmals auf rein festkörperchemischem Weg, über einen reduktiven, vollständigen Alkalimetall-Austausch, Einkristalle eines Oxomanganates(VI) der Alkalimetalle dargestellt werden.Der Madelung-Anteil der Gitterenergie, MAPLE, sowie die Ladungsverteilung wurden berechnet.
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  • 11
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 225-228 
    ISSN: 0044-2313
    Keywords: Polyiodide ; triiodide ; urotropinium triiodide ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on Polyhalides. 17. Preparation and Crystal Structure of Urotropinium Triiodide, UrHI3Urotropinium triiodide C6H13N4I3 is formed by the reaction of equimolar amounts of urotropinium iodide and iodine in tBuOH as red-brown cube-like crystals melting at 402 K under decomposition. The compound crystallizes monoclinically in the space group P21/c with a = 952.0(3) pm, b = 1 160.2(6) pm, c = 1 149.9(4) pm, β = 92.22(3)° and Z = 4. The till now not described crystal structure (R = 0.027 for 1 860 observed reflexes) contains urotropinium ions UrH+ and slightly distorted triiodide ions I3-(d(I - I) = 292.3(1), 294.1(1) pm, ϕ(I - I - I) = 178.27(2)°) which are linked to ion pairs by a rather short contact (d(I … I) = 389.0(1) pm, ϕ(I - I … I) = 149.12(2)°).
    Notes: Urotropiniumtriiodid C6H13N4I3 fällt bei der Umsetzung äquimolarer Mengen Urotropiniumiodid und Iod aus tBuOH in rotbraunen würfelähnlichen Kristallen an, die bei 402 K unter Zersetzung schmelzen. Die Substanz kristallisiert in der monoklinen Raumgruppe P21/c mit a = 952,0(3) pm, b = 1 160,2(6) pm, c = 1 149,9(4) pm, β = 92,22(3)° und Z = 4. Die bisher nicht beschriebene Kristallstruktur (R = 0,027 für 1 860 beobachtete Reflexe) enthält Urotropiniumionen UrH+ und geringfügig verzerrte Triiodidionen I3-(d(I - I) = 292,3(1), 294,1(1) pm, ϕ(I - I - I) = 178,27(2)°), die über einen kurzen Kontakt Ionenpaare bilden (d(I … I) = 389,0(1) pm, ϕ(I - I … I) = 149,12(2)°).
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  • 12
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 311-322 
    ISSN: 0044-2313
    Keywords: Cobalticinium cation ; template effect ; clathrasils ; crystal structure ; penta-coordinated silicon ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Das Cobaltocenium-Kation [CoIII(η5-C5H5)2]+: Ein metallorganischer Komplex als neuartiges Templat für die Synthese von ClathrasilenDas Cobaltocenium-Kation [CoIII(η5-C5H5)2]+ ≡ Cocp2+ ist der erste metallorganische Komplex, der bei der Synthese von mikroporösen Feststoffen nachweislich als strukturdirigierendes Templat wirkt. Bei der hydrothermalen Behandlung des Synthesesystems SiO2—NH4F—Cocp2PF6—H2O bei 420-470 K kristallisieren drei verschiedene Clathrasil-Gerüststrukturen: Nonasil (NON), Octadecasil (AST) und Dodecasil 1H (DOH). Aus den Infrarot-, optischen und Röntgenabsorptions(XANES, EXAFS)-Spektren folgt, daß das Cobaltocenium-Kation unzersetzt in das kristallisierende Silicat-Gerüst eingebaut wird, was seine Rolle als Templat bestätigt. Thermoanalytische Untersuchungen zeigen, daß im Silicat-Gerüst eingeschlossenes Cocp2+ eine viel höhere thermische Stabilität besitzt als in einfachen Salzen.Vom Cobaltocenium-Nonasil wurde eine Röntgen-Einkristall-Strukturbestimmung bei 220 K durchgeführt: [Cocp2F]4 · 88 SiO2, orthorhombisch, Raumgruppe Pccn (No. 56), a = 22,125(2) Å, b = 13,612(3) Å, c = 14,889(2) Å, Z = 1. Jeder große [58612]-Käfig des Nonasil-Gerüsts ist mit einem Cocp2+-Kation in staggered-Konformation besetzt, das keine Orientierungs- oder Rotations-Fehlordnung aufweist, sondern aufgrund sterischer Hinderung und durch schwache C—H … O(Wirt)-Wechselwirkungen fixiert ist. Die Fluorid-Anionen kompensieren die positive Ladung des Cocp2+ und befinden sich in der Hälfte der kleinen [4158]-Käfige vor den Vierring-Fenstern. Sie koordinieren zu den benachbarten Gerüstatomen Si1 (d(Si1—F): 1,836(6) Å) und bewirken dadurch eine Verzerrung der tetraedrischen Sauerstoff-Umgebung zu einer nahezu idealen, trigonal-bipyramidalen Penta-Koordination von Si1.
    Notes: The cobalticinium cation [CoIII(η5-C5H5)2]+ ≡ Cocp2+ is the first metal-organic complex that acts as a structure-directing template in the hydrothermal synthesis of microporous solids. Three different clathrasil framework structures - nonasil (NON), octadecasil (AST) and dodecasil 1H (DOH) - crystallize during hydrothermal treatment from the synthesis system SiO2—NH4F—Cocp2PF6—H2O at 420-470 K. From infrared, optical and x-ray absorption (XANES, EXAFS) spectroscopic measurements, it is evident that the cobalticinium cation remains unchanged upon incorporation into the crystallizing silica framework proving its role as a template. Thermal analysis demonstrates that Cocp2+ entrapped in silica frameworks possesses a much higher thermal stability than the cation in simple salts.An X-ray single-crystal structure determination of cobalticinium nonasil was performed at 220 K: [Cocp2F]4 · 88 SiO2, orthorhombic, space group Pccn, a = 22.125(2) Å, b = 13.612(3) Å, c = 14.889(2) Å, Z = 1. Each of the large [58612]-cages of the nonasil structure is occupied by a Cocp2+ cation in staggered conformation which does not show any orientational or rotational disorder but is fixed due to steric confinement and weak C—H … O(host) interactions. Fluoride anions that compensate the charge of the Cocp2+ cations reside in half of the small [4158] cages in front of the four-membered rings. They coordinate to the neighbouring framework atom Si1 (d(Si1—F): 1.836(6) Å), causing a distortion of the tetrahedral oxygen environment to a nearly ideal trigonal-bipyramidal penta-coordination of Si1.
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  • 13
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 47-56 
    ISSN: 0044-2313
    Keywords: Iodoantimonate anion ; iodobismuthate anion ; complex compounds ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Strukturuntersuchungen an einigen Iodoantimonat- und Iodobismutat-AnionenDie Reaktion zwischen BiI3 und zwei Äquivalenten dmpu (dmpu = N,N′-Dimethylpropylharnstoff) in THF oder Toluol ergibt dunkelrote Kristalle von [Bi(dmpu)6] · [Bi3I12]. Nach röntgenographischer Charakterisierung besteht die Verbindung aus oktaedrischen [Bi(dmpu)6]3+-Kationen und [Bi3I12]3--Anionen, beide mit der Symmetrie 3. Die analoge Reaktion mit SbI3 ergibt orange Kristalle von [C5NH6]2[H(dmpu)2][Sb2I9], wahrscheinlich ein Hydrolyseprodukt. Die röntgenographische Charakterisierung ergab flächenverknüpfte dioktaedrische [Sb2I9]3--Anionen mit zwei Pyridinium und einem [H(dmpu)2]+-Kation.[CH2=C(C6H4-4-NO2)CH2NMe3]I und ein Äquivalent SbI3 ergibt den orangen, kristallinen Komplex [CH2=C(C6H4-4-NO2)CH2NMe3]3[Sb2I9] mit flächenverknüpften dioktaedrischen [Sb2I9]3--Anionen.[CH2=C(C6H4-4-NO2)CH2NMe3]I und vier Äquivalente BiI3 ergeben [CH2=C(C6H4-4-NO2)CH2NMe3]3[Bi3I12] mit dem zum [Bi(dmpu)6][Bi3I12] analogen Anion.[CH3(CH2)2COS(CH2)2NMe3]I mit vier Äquivalenten SbI3 ergeben orange Kristalle von [CH3(CH2)2COS(CH2)2NMe3]4 · [Sb8I28], die nach Röntgenstrukturuntersuchungen einen neuen Strukturtyp von [E8X28]4--Anionen (E = As, Sb, Bi; X = Halogen) darstellen.
    Notes: The reaction between BiI3 and two equivalents of dmpu (dmpu = N,N′-dimethylpropylene urea) in thf (tetrahydrofuran) or toluene affords dark red crystals of the complex [Bi(dmpu)6][Bi3I12] which was characterised by X-ray crystallography and consists of octahedral [Bi(dmpu)6]3+ cations and [Bi3I12]3- anions both with 3 symmetry. An analogous reaction between SbI3 and dmpu afforded orange crystals of what is probably a hydrolysis product, [C5NH6]2[H(dmpu)2][Sb2I9], which was also characterised by X-ray crystallography and contains a face-shared bioctahedral [Sb2I9]3- anion with two pyridinium cations and a hydrogen bonded [H(dmpu)2]+ cation. [CH2=C(C6H4-4-NO2)CH2NMe3]I and one equivalent of SbI3 afforded the orange crystalline complex [CH2=C(C6H4-4-NO2)CH2NMe3]3[Sb2I9] an X-ray crystallographic study of which revealed a face-shared bioctahedral [Sb2I9]3- anion similar to that present in [C5NH6]2[H(dmpu)2][Sb2I9]. Four equivalents of BiI3 and [CH2=C(C6H4-4-NO2)CH2NMe3]I afforded the complex [CH2=C(C6H4-4-NO2)CH2NMe3]3[Bi3I12], the [Bi3I12]3- anion being essentially identical to that encountered in [Bi(dmpu)6][Bi3I12]. [CH3(CH2)2COS(CH2)2NMe3]I and four equivalents of SbI3 yielded orange crystals of the complex [CH3(CH2)2COS(CH2)2NMe3]4[Sb8I28] which was also characterised by X-ray crystallography and shown to contain a new structural type of [E8X28]4- anion (E = As, Sb, Bi; X = halide).
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  • 14
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    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 57-62 
    ISSN: 0044-2313
    Keywords: ternary palladium pnictides ; europium ; calcium ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structures with AlB2- and CeMg2Si2-Type Units. The Compounds Eu3Pd4As4, Ca4Pd5P5, and Ca5Pd6P6The new compounds Eu3Pd4As4, Ca4Pd5P5, and Ca5Pd6P6 (space groups and lattice constants see „Inhaltsübersicht“) have been prepared by heating mixtures of the elements. Their structures were determined by means of single-crystal X-ray methods and contain exclusively units, which are characteristic for the AlB2- and CeMg2Si2-type. The non-metal atoms are isolated from each other or connected to pairs; the ratio between these two kinds can be interpreted by ionic splittings of the formulas.
    Notes: Eu3Pd4As4 (Pmmm; a = 4,205(2) Å, b = 4,308(1) Å, c = 12,640(7) Å; Z = 1), Ca4Pd5P5 (Cmcm; a = 4,094(1) Å, b = 31,061(4) Å, c = 8,168(1) Å; Z = 4) und Ca5Pd6P6 (Pmma; a = 8,172(2) Å, b = 4,088(1) Å, c = 19,077(6) Å; Z = 2) wurden durch Erhitzen der jeweiligen Elemente dargestellt. Die mit Röntgen-Einkristallmethoden bestimmten Kristallstrukturen setzen sich ausschließlich aus AlB2- und CeMg2Si2-analogen Einheiten zusammen. Die Nichtmetallatome sind teils voneinander isoliert und teils zu Hanteln miteinander verknüpft; das jeweilige Verhältnis läßt sich mit Hilfe einer ionischen Formelaufspaltung interpretieren.
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  • 15
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    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 149-152 
    ISSN: 0044-2313
    Keywords: Hexaoxodiphosphate(IV) hydrate of cobalt ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of Cobalt(II)-hexaoxodiphosphate(P—P)(4-)-dodecahydrate, Co2P2O6 · 12 H2OCo2P2O6 · 12H2O was obtained by cleavage and simultaneous oxidation of cyclo-hexaphosphate(III) in a solution of ethanol and aqueous ammonia. The crystal structure has been determined (1 898 independent diffractometer data): space group Pbam (No. 55), a = 6.710(2), b = 12.196(2), c = 10.073(3) Å, V = 825.3(1) Å3, Z = 2, R = 0.060. The P2O64- anions show site symmetry C2h and are connected to form chains via cobalt. Two cobalt ions together with two sets of four water molecules and two oxygen atoms of P2O64- form pairs of edge connected octahedra. The common edges are formed by the oxygen atoms of the P2O6 groups.
    Notes: Co2P2O6 · 12 H2O entsteht bei oxidativer Ringspaltung an cyclo-Hexaphosphaten(III) in ammoniakalisch ethanolischer Lösung. Die Kristallstruktur wurde auf der Basis von Vierkreisdiffraktometerdaten (4018 gemessene Reflexe) gelöst (1 898 unabhängige Reflexe): Raumgruppe Pbam (No. 55); a = 6,710(2), b = 12,196(2), c = 10,073(3) Å, V = 825,3(1) Å3; Z = 2; R = 0,060. Die Anionen P2O64- mit der Lagesymmetrie C2h sind über Cobalt zu Ketten verknüpft. Je zwei Cobaltionen bilden mit je vier Wassermolekülen und zwei terminalen Sauerstoffatomen des P2O64- verzerrte, kantenverknüpfte Oktaederpaare aus. Deren gemeinsame Kanten werden durch Sauerstoffatome der P2O6-Gruppen gebildet.
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  • 16
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    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 181-185 
    ISSN: 0044-2313
    Keywords: Copper lanthanoide oxotungstate ; CuDy5(WO4)8 ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A New Structure Type of Copper Lanthanoide Oxotungstates: CuDy5(WO4)8Single crystals of the hitherto unknown compound CuDy5(WO4)8 were prepared in closed copper tubes and investigated by X-ray technique. It shows monoclinic symmetry, space group C2h6 - C2/c, a = 19.118, b = 5.612, c = 11.518 Å, β = 111.32°, Z = 2. The crystal structure is characterized by [W4O18] groups which are connected to layers. Dy3+ shows one sided capped trigonal prisms and Cu+/Dy3+ with statistical distribution an octahedral oxygen surrounding.
    Notes: Die bisher unbekannte Verbindung CuDy5(WO4)8 wurde einkristallin in geschlossenen Kupferrohren dargestellt und röntgenographisch untersucht. Sie kristallisiert mit monokliner Symmetrie, Raumgruppe C2h6 - C2/c mit a = 19,118; b = 5,612; c = 11,518 Å; β = 111,32°; Z = 2. Die Kristallstruktur zeichnet sich durch [W4O18]-Baugruppen aus, die zu Schichten verknüpft sind. Dy3+ zeigt einfach überkappt trigonal prismatische, die in statistischer Verteilung vorliegenden Cu+/Dy3+-Ionen eine oktaedrische Sauerstoffumgebung.
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  • 17
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    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 191-196 
    ISSN: 0044-2313
    Keywords: Ternary phosphide ; copper ; barium ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ba8Cu16P30 - a New Ternary Variant of the Clathrate I Type StructureBa8Cu16P30 (a = 14.117(1) Å, b = 10.093(1) Å, c = 28.022(2) Å) was prepared by heating a mixture of the elements (800°C; excess of Ba and P; removal of the by-products by acetic acid/H2O2). The compound crystallizes orthorhombically (Pbcn; Z = 4) in a new superstructure of the cubic clathrate I type structure with an ordered distribution of the atoms. The structure is characterized by a three-dimensional framework of CuP4 tetrahedra with cavities in the form of pentagonal dodecahedra and tetrakaidecahedra, which are occupied by the Ba atoms. The compound shows semiconduction, therefore the composition should be Ba8Cu15.5P30.5.
    Notes: Ba8Cu16P30 (a = 14,117(1) Å, b = 10,093(1) Å, c = 28,022(2) Å) wurde durch Erhitzen eines entsprechenden Elementgemenges auf ca. 800°C erhalten (Ba- und P-Überschuß; Entfernen der Nebenprodukte mit Eisessig/H2O2). Die Verbindung kristallisiert orthorhombisch (Pbcn; Z = 4) in einer neuen Überstruktur des kubischen Clathrat I-Strukturtyps mit einer geordneten Atomverteilung und wird durch ein dreidimensionales Gerüst aus CuP4-Tetraedern geprägt. Diese sind über gemeinsame Ecken so miteinander verknüpft, daß Käfige in Form von Pentagondodekaedern und Tetrakaidekaedern entstehen, die für diesen Strukturtyp charakteristisch und hier mit Ba-Atomen belegt sind. Die Verbindung ist ein Halbleiter, deren Zusammensetzung aufgrund der Ladungsbilanz Ba8Cu15,5P30,5 sein sollte.
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  • 18
    ISSN: 0044-2313
    Keywords: Gallium iridium boride ; crystal structure ; preparation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ga8Ir4B - a Gallium Iridium Boride with isolated, nearly square planar Ir4B Groups in a Structure derived from the CaF2 TypeThe new compound Ga8Ir4B (tetragonal, I41/acd, a = 853.69(2) pm, c = 2 105.69(6) pm, Z = 8, 614 reflections, 31 parameters, R = 0.034) was prepared by reaction of the elements at 1 100°C. The structure is derived from the CaF2 type. It contains isolated Ir4B groups with boron in an unusual, nearly square planar coordination.
    Notes: Die neue Verbindung Ga8Ir4B (tetragonal, I41/acd, a = 853,69(2) pm, c = 2105,69(6) pm, Z = 8, 614 Reflexe, 31 Parameter, R = 0,034) wurde durch Reaktion der Elemente bei 1 100°C dargestellt. Die Struktur läßt sich vom CaF2-Typ ableiten. Sie enthält isolierte Ir4B-Gruppen mit Bor in einer ungewöhnlichen, nahezu quadratisch planaren Koordination.
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  • 19
    ISSN: 0044-2313
    Keywords: Phosphido-bridged dinuclear complexes ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Phosphido- and Arsenido-bridged Dinuclear Complexes. Synthesis and Molecular Structure of (η5-C5H4R)2Zr{μ-P(SiMe3)2}2M(CO)4 (R = Me, M = Cr; R = H, M = Mo) and Synthesis of (η5-C5H5)2Zr{μ-As(SiMe3)2}2Cr(CO)4The reaction of (η5-C5H4R)2Zr{E(SiMe3)2}2 with M(CO)4(NBD) (NBD = norbornadiene) yields the dinuclear phosphido- or arsenido-bridged complexes (η5-C5H4R)2Zr{μ-E(SiMe3)2}2M(CO)4 (R = Me, E = P, M = Cr (1); R = H, E = P, M = Mo (2); R = H, E = As, M = Cr (3)). No formation of dinuclear complexes was observed in the reaction of (η5-C5H4Me)2Zr{P(SiMe3)2}2 with Ni(PEt3)4, Ni(CO)2(PPh3)2 or with NiCl2(PPh3)2 in the presence of Mg. Complexes 1-3 were characterised spectroscopically (i. r., n. m. r., m. s.), and X-ray structure investigations were carried out on 1 and 2. The central four-membered ZrP2M ring is slightly puckered (dihedral angle between planes ZrP2/CrP2 14.7°, ZrP2/MoP2 14.2°). The Zr—P bond lengths are equivalent (1: Zr—P1 2.654(4), Zr—P2 2.657(4) Å; 2: Zr—P1 2.6711(9), Zr—P2 2.6585(7) Å), as are the M—P bond lengths (M = Cr (1): Cr—P1 2.513(4), Cr—P2 2.502(4) Å; M = Mo (2): Mo—P1 2.6263(7), Mo—P2 2.6311(10) Å). The long Zr ··· M distances of 3.414 Å (M = Cr (1)) and 3.461 Å (M = Mo (2)) indicate the absence of a metal-metal bond.
    Notes: Die Reaktion von (η5-C5H4R)2Zr{E(SiMe3)2}2 mit M(CO)4(NBD) (NBD = Norbornadien) liefert die phosphido- oder arsenido-verbrückten Zweikernkomplexe (η5-C5H4R)2Zr{μ-E(SiMe3)2}2M(CO)4 (R = Me, E = P, M = Cr (1); R = H, E = P, M = Mo (2); R = H, E = As, M = Cr (3)). Hingegen führen die Umsetzungen von (η5-C5H4Me)2Zr{P-(SiMe3)2}2 mit Ni(PEt3)4, Ni(CO)2(PPh3)2 oder mit NiCl2(PPh3)2 in Gegenwart von Mg nicht zu entsprechenden Zweikernkomplexen. Die Verbindungen 1-3 wurden spektroskopisch charakterisiert (IR, NMR, MS), 1 und 2 zusätzlich durch eine Röntgenstrukturanalyse. Der zentrale Vierring ZrP2M ist leicht gewellt (Diederwinkel zwischen den Ebenen ZrP2/CrP2 14,7°, ZrP2/MoP2 14,2°). Die Zr—P- oder M—P-Bindungslängen sind nahezu gleich (1: Zr—P1 2,654(4), Zr—P2 2,657(4) Å, Cr—P1 2,513(4), Cr—P2 2,502(4) Å; 2: Zr—P1 2,6711(9), Zr—P2 2,6585(7) Å; Mo—P1 2,6263(7), Mo—P2 2,6311(10) Å). Der lange Zr ··· M-Abstand von 3,414 Å (M = Cr (1)) und 3,461 Å (M = Mo (2)) weist auf das Fehlen einer Metall-Metall-Bindung hin.
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  • 20
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    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 567-570 
    ISSN: 0044-2313
    Keywords: Copper terbium borate ; synthesis ; crystal structure ; X-ray-diffraction ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: CuTb[B5O10]: The first “Metaborate” with a ∞1[B5O10]5- AnionSingle crystals of the new compound CuTb[B5O10] were obtained by a B2O3 flux-technique. They crystallize in a so far unknown structure. X-ray investigations on single crystals led to the space group C2v21-I ba2 (Nr. 45); a = 6.294(1) Å; b = 8.406(8) Å; c = 12.733(2) Å; Z = 4. The structure contains ∞1[B5O10]5- chains isolated from each other. These chains include twelf membered rings of boron and oxygen. Each ring consists of two tetrahedral BO4 and two planar B2O5 groups and is connected with the next one via the BO4 units. Tb3+ is eightfold- and Cu2+ elongated octahedraly coordinated by oxygen.
    Notes: Aus einer B2O3-Schmelze entstanden hellbraune, transparente Einkristalle von CuTb[B5O10] mit völlig neuartigem Kristallstrukturtyp. Röntgenographische Untersuchungen an Einkristallen ergaben die Raumgruppe C2v21-Iba2 (Nr. 45); a = 6,294(1) Å; b = 8,406(8) Å; c = 12,733(2) Å; Z = 4. Die Struktur weist voneinander isolierte ∞1[B5O10]5--Ketten auf. Diese Ketten enthalten Bor-Sauerstoff-Zwölfringe, die jeweils aus zwei tetraedrischen BO4- und zwei planaren B2O5-Baugruppen gebildet werden. Die Verknüpfung der Ringe untereinander geschieht über die BO4-Baugruppe. Tb3+ ist achtfach und Cu2+ elongiert oktaedrisch von Sauerstoff umgeben.
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  • 21
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    Zeitschrift für anorganische Chemie 621 (1995), S. 571-575 
    ISSN: 0044-2313
    Keywords: Copper ; iron ; gallium ; borate ; oxide ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structure of Cu2M(BO3)O2 (M = Fe3+, Ga3+)Single Crystals of the compounds Cu2M(BO3)O2 (M = Fe3+ (I), Ga3+ (II)) were obtained by a B2O3 flux-technique. They crystallize in a monoclinic distorted variant of a Ludwigite structure with a partly ordered metal distribution. X-ray investigations on single crystals led to the space group C2h5-P21/c (No. 14); I: a = 3.108(1); b = 12.003(1); c = 9.459(3) Å; b̃ = 96.66(3)°; Z = 4 and II: a = 3.1146(2); b = 11.921(3); c = 9.477(2) Å; b̃ = 97.91(2)°; Z = 4. All metal-sites are distorted octahedraly coordinated by oxygen-ions. The structure contains isolated planar BO3-units and oxygen which is not coordinated to boron.
    Notes: Aus einer B2O3-Schmelze gelang die Synthese von Einkristallen der Substanzen Cu2M(BO3)O2 (M = Fe3+ (I), Ga3+ (II)), die isotyp zueinander sind und in einer monoklin verzerrten Strukturvariante eines Ludwigites mit teilweise geordneter Metallverteilung kristallisieren. Röntgenographische Untersuchungen an Einkristallen ergeben die Raumgruppe C2h5-P 21/c (Nr. 14) mit I: a = 3,108(1); b = 12,003(1); c = 9,459(3) Å; b̃ = 96,66(3)°; Z = 4 und II: a = 3,1146(2); b = 11,921(3); c = 9,477(2) Å; b̃ = 97,91(2)°; Z = 4. Die Metallkationen sind verzerrt oktaedrisch von Sauerstoffionen koordiniert. Die Struktur weist sowohl isolierte, planare BO3-Baugruppen als auch nicht an Bor gebundenen Sauerstoff auf.
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  • 22
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1358-1364 
    ISSN: 0044-2313
    Keywords: Phosphorus tin heterocycles ; syntheses ; crystal structure ; NMR ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Structure Analysis of (tBuP)4Sn(CH3)2 and (CH3)2Sn[(tBu)P—P(tBu)]2Sn(CH3)2The diphosphides K2[(tBu)P—(tBuP)2—P(tBu)] 7 or K2[(tBu)P—P(tBu)] 8 react with (CH3)2SnCl2 in a molar ratio of 1 : 1 to form the binary 5-membered ring system P4Sn 4 a and the 6-membered ring system Sn(P2)2Sn 5 a respectively. When (CH3)2SnCl2, however, is treated with 8 in a molar ratio of 2 : 1 the 4-membered ring system P3Sn 2 a is formed which includes the fragmentation of the intermediate K2[(CH3)2Sn ((tBu)P—P(tBu))2] 9. 4 a and 5 a could be obtained in a pure form and characterized NMR spectroscopically and by X-ray structure analyses; 2 a was identified only NMR spectroscopically.
    Notes: Die Diphosphide K2[(tBu)P—(tBuP)2—P(tBu)] 7 bzw. K2[(tBu)P—P(tBu)] 8 reagieren mit (CH3)2SnCl2 im Molverhältnis 1 : 1 zu dem binären Fünfringsystem P4Sn 4 a bzw. dem Sechsringsystem Sn(P2)2Sn 5 a. Wird jedoch (CH3)2SnCl2 mit zwei Äquivalenten 8 umgesetzt, so erhält man nach einer Fragmentierung des Intermediats K2[(CH3)2Sn ((tBu)P—P(tBu))2] 9 das binäre Vierringsystem P3Sn 2 a. 4 a und 5 a konnten in reiner Form isoliert, NMR-spektroskopisch und durch Röntgenstrukturanalysen charakterisiert werden; 2 a konnte bisher nur NMR-spektroskopisch identifiziert werden.
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  • 23
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1385-1394 
    ISSN: 0044-2313
    Keywords: Palladium ; quaternary fluorides ; LiPdGaF6 ; RbPdAlF6 ; K1.06Pd0.95Fe1.05F6 ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structure of LiPdGaF6, RbPdAlF6 and K1.06Pd0.95Fe1.05F6Single crystals of LiPdGaF6 (blue; trigonal, P31c-D3d2 (No. 163), a = 505.72(2), c = 923.7(2) pm; LiCaAlF6-Type [1]), RbPdAlF6 (violet; orthorhombic, Pnma-D2h16 (No. 62), a = 729.0(1), b = 711.1(1), c = 1006.5(2) pm; CsAgFeF6-Type [2]) and K1.06Pd0.95Fe1.05F6 (greenish-blue; tetragonal, P42/mbc-D4h13 (No. 135), a = 1 279.07(7), c = 800.2(1) pm; K1,08MnFeF6-Type [3]; four cycle diffractometer data, Siemens AED2) are obtained by heating the binary fluorides in sealed Pd-tubes under dry argon [solid state reaction, T ≈ 650, t ≈ 19 d (39 d, 24 d)].
    Notes: Durch Umsetzung von äquimolaren Gemengen der binären Fluoride im verschweißten Pd-Rohr unter Schutzgas [Ar, Festkörperreaktion, T = 650°C, t = 19 d (39 d, 24 d)] erhält man Einkristalle von LiPdGaF6 (blau, trigonal, P31c-D3d2 (No. 163), a = 505,72(2), c = 923,7(2) pm, LiCaAlF6-Typ [1]), RbPdAlF6 (violett, orthorhombisch, Pnma-D2h16 (No. 62), a = 729,0(1), b = 711,1(1), c = 1006,5(2) pm, CsAgFeF6-Typ [2]) sowie K1,06Pd0,95Fe1,05F6 (blau-grün, tetragonal, P42/mbc-D4h13 (No. 135), a = 1279,07(7), c = 800,2(1) pm; K1,08MnFeF6-Typ [3]; jeweils Vierkreisdiffraktometerdaten).
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  • 24
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1380-1384 
    ISSN: 0044-2313
    Keywords: silicon nitrides ; nitrido-silicates ; strontium ; barium ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Nitrido-Silicates. II. High Temperature Syntheses and Crystal Structures of Sr2Si5N8 and Ba2Si5N8Pure Sr2Si5N8 and Ba2Si5N8 were obtained by reaction of silicon diimide with metallic strontium and barium, respectively. The reactions have been carried out under nitrogen atmosphere in a specially developed high-frequency furnace at temperatures between 1 550 and 1 650°C. Sr2Si5N8 (Pmn21, a = 571.0(2), b = 682.2(2), c = 934.1(2) pm, Z = 2, R = 0.037, wR = 0.021) and Ba2Si5N8 (Pmn21, a = 578.3(2), b = 695.9(2), c = 939.1(2) pm, Z = 2, R = 0.022, wR = 0.018) are isotypic and contain M2+ ions as well as a three-dimensional covalent network structure of corner-sharing SiN4 tetrahedra. Two sorts of N occur with molar ratio 1 : 1 which are bonded to two and three Si, respectively. Predominantly, the N which are bonded to two Si belong to the coordination spheres of the M2+ ions.
    Notes: Sr2Si5N8 und Ba2Si5N8 werden phasenrein durch Umsetzung von Siliciumdiimid mit den jeweiligen Metallen Strontium bzw. Barium unter Stickstoffatmosphäre in einem speziellen Hochfrequenzofen bei 1 550 bis 1 650°C synthetisiert. Sr2Si5N8 (Pmn21, a = 571,0(2), b = 682,2(2), c = 934,1(2) pm, Z = 2, R = 0,037, wR = 0,021) und Ba2Si5N8 (Pmn21, a = 578,3(2), b = 695,9(2), c = 939,1(2) pm, Z = 2, R = 0,022, wR = 0,018) kristallisieren isotyp und sind aus M2+-Ionen (M = Sr bzw. Ba) sowie einer kovalenten dreidimensionalen Raumnetzstruktur eckenverknüpfter SiN4-Tetraeder aufgebaut. Je 4 N sind an zwei bzw. drei Si gebunden. Die an je zwei Si gebundenen N leisten den dominierenden koordinativen Beitrag für die M2+-Ionen.
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  • 25
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1414-1420 
    ISSN: 0044-2313
    Keywords: Yttrium chloroaluminate ; crystal structure ; solution calorimetry ; thermodynamic data ; phase diagram ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thermal Behaviour and Crystal Structure of YAl3Cl12We determined the thermodynamic data of YAl3Cl12 ΔHYOAl3Cl12,298 = -739.9 ± 3 kcal/mol and SYOAl3Cl12,298 = 136.1 ± 4 cal/K · mol by total pressure measurements and ΔHYOAl3Cl12,298 = -739.1 ± 1.6 kcal/mol by solution calorimetry. Using DTA-investigations we established the phase diagram in the system AlCl3-YCl3. The crystal structure was refined on the basis of single crystal data (P31 12; Z = 3; a = 1 046.8(2); c = 1 562.3(3) pm).
    Notes: Mit phasenreinem YAl3Cl12 werden Zersetzungsdruckmessungen im Membrannullmanometer und lösungskalorimetrische Messungen zur Bestimmung der thermodynamischen Daten der Verbindung durchgeführt, wobei wir aus den Druckmessungen ΔHYOAl3Cl12,298 = -739,9 ± 3 kcal/mol und SYOAl3Cl12,298 = 136,1 ± 4 cal/K · mol ermitteln und lösungskalorimetrisch ΔHYOAl3Cl12,298 = -739,1 ± 1,6 kcal/mol herleiten. DTA-Untersuchungen dienten der Aufstellung eines Phasendiagrammes im System YCl3—AlCl3.Anhand der Einkristalldaten wurde die Struktur verfeinert (P3112; Z = 3; a = 1 046,8(2); c = 1 562,3(3) pm).
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  • 26
    ISSN: 0044-2313
    Keywords: zinc, cadmium, tin, arsenic, antimony, bismuth, cobalt, copper, trithio complexes, perthio complexes, perthiodicarbonate ; synthesis ; crystal structure ; IR spectroscopy ; Raman spectroscopy ; 113Cd and 59Co NMR spectroscopy ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Simple Trithio- and Perthiocarbonato Complexes with Interesting Bond Properties: [E(CS3)2]2- (E = Sn, Zn, Cd), [E(CS3)3]3- (E = As, Sb, Bi, Co), {Cu(CS3)-}∞ and [Zn(CS4)2]2-By reactions of potassium trithiocarbonate (1) with solutions of zinc(II)- acetylacetonate, cadmium(II)-chloride, tin(II)-chloride, arsenic(III)-sulfide (suspension), antimony(III)-chloride, bismuth(III)-chloride and copper(II)-chloride in dimethyl sulfoxide, as well as of trisodium hexanitrito cobaltate(III) in water, and the precipitation of the complexes with an aqueous solution of tetraphenylphosphonium chloride the compounds (PPh4)2[Zn(CS3)2] (2), (PPh4)2[Cd(CS3)2] (3), (PPh4)2[Sn(CS3)2] (4), (PPh4)3[As(CS3)3] (5), (PPh4)3[Sb(CS3)3] (6), (PPh4)3[Bi(CS3)3] (7), (PPh4)3[Co(CS3)3] (8) and (PPh4)Cu(CS3) (9) have been isolated. (PPh4)2[Zn(CS4)2] · CH3NO2 (10) has been prepared by heating a solution of 2 in nitromethane to 60--70°C in presence of air. The reaction of 1 in dimethyl sulfoxide with an aqueous tetraphenylphosphonium chloride solution in presence of oxygen leads to (PPh4)2[C2S6] (11). The compounds have been characterized by spectroscopical studies (IR, Raman, UV/Vis, 113Cd/59Co-NMR), magnetic susceptibility measurements, powder diffractometry, elemental analyses and single crystal X-ray structure analysis (4-7, 10 and 11). The difficult growing of single crystals has been reported in detail. For crystal data see Inhaltsübersicht.
    Notes: Durch Reaktion von Lösungen von Zink(II)-acetylacetonat, Cadmium(II)-chlorid, Zinn(II)-chlorid, Arsen(III)-sulfid (Suspension), Antimon(III)- chlorid, Bismut(III)-chlorid und Kupfer(II)-chlorid in Dimethylsulfoxid - bzw. von Trinatriumhexanitritocobaltat(III) in Wasser - mit Kaliumtrithiocarbonat (1) sowie anschließender Fällung der Komplexe mit wäßriger Tetraphenylphosphoniumchlorid-Lösung wurden die Verbindungen (PPh4)2[Zn(CS3)2] (2), (PPh4)2[Cd(CS3)2] (3), (PPh4)2[Sn(CS3)2] (4), (PPh4)3[As(CS3)3] (5), (PPh4)3[Sb(CS3)3] (6), (PPh4)3[Bi(CS3)3] (7), (PPh4)3[Co(CS3)3] (8) und (PPh4)Cu(CS3) (9) isoliert. (PPh4)2[Zn(CS4)2] · CH3NO2 (10) ließ sich aus einer Lösung von 2 in Nitromethan, die in Gegenwart von Luftsauerstoff auf 60-70°C erwärmt wurde, isolieren. Bei Umsetzung von 1 in Dimethylsulfoxid mit einer wäßrigen Tetraphenylphosphoniumchlorid-Lösung in Gegenwart von Sauerstoff bildete sich (PPh4)2[C2S6] (11). Die Verbindungen wurden durch spektroskopische Methoden (IR, Raman, UV/VIS sowie 113Cd- und 59Co-NMR), Messung der magnetischen Suszeptibilität, Pulverdiffraktometrie, Elementaranalysen und Einkristall-Röntgenstrukturanalyse (4-7, 10 und 11) charakterisiert. Die schwierige Züchtung von Einkristallen wird im Detail beschrieben. 4:P1, a = 969,1(2), b = 1 335,3(3), c = 3 749,9(7) pm, α = 84,54(3)°, β = 80,88(3)°, γ= 74,90(3)°, V = 4 618(2)×106 pm3, Z = 4, R = 0,082 für 7 635 unabhängige Reflexe (Fo 〉 4σ(Fo));5:C2/c, a = 2 236,6(4), b = 1 441,0(3), c = 4 267,7(9) pm, β = 98,59(3)°, V = 13 600(15)×106 pm3, Z = 8, R = 0,130 für 3 807 unabhängige Reflexe (Fo 〉 4σ(Fo));6:P21, a = 1 555,0(9), b = 1 437,1(5), c = 1 587,6(9) pm, β = 90,30(5)°, V = 3 547(3)×106pm3, Z = 2;7:P21, a = 1 559,6(4), b = 1 425,2(4), c = 1 585,1(4) pm, β = 90,05(2)°, V = 3 523(2)×106 pm3, Z = 2, R = 0,088 für 4 206 unabhängige Reflexe (Fo 〉 4σ(Fo));10:C2/c, a = 1 049,1(4), b = 2 023,9(9), c = 2 474,7(9) pm, β = 99,93(3)°, V = 5 176(3)×106 pm3, Z = 4, R = 0,079 für 2 172 unabhängige Reflexe (Fo 〉 4σ(Fo));11:P21/c, a = 1 673,0(5), b = 1 430,8(5), c = 1 859,1(5) pm, β = 94,12(2)°, V = 4 439(2)×106 pm3, Z = 4, R = 0,086 für 4 014 unabhängige Reflexe (Fo 〉 4σ(Fo)).
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1189-1192 
    ISSN: 0044-2313
    Keywords: Sodium hydroxide iodide ; synthesis ; single-crystals ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Na7I2(OH)5: A Hydroxide Iodide in the System NaOH/NaIThe pseudobinary system NaOH/NaI is investigated by X-ray methods. The crystal structure of the compound Na7I2(OH)5 was solved by single crystal data:Na7I2(OH)5: P4/nmm, Z = 2, a = 7.748(2) Å, c = 10.260(3) Å, Z(Fo) = 443 with (Fo)2 ≥ 3σ(Fo)2, Z(parameter) = 28, R/Rw = 0.044/0.059Na7I2(OH)5 crystallizes in a new type of structure which contains puckered layers of ∞2[Na7(OH)52+] connected via iodide ions.
    Notes: Das pseudobinäre System NaOH/NaI wurde röntgenographisch untersucht und die Struktur einer Verbindung, Na7I2(OH)5, mittels Röntgenstrukturanalyse an Einkristallen aufgeklärt:Na7I2(OH)5: P4/nmm, Z = 2, a = 7,748(2) Å, c = 10,260(3) Å, Z(Fo) = 443 mit (Fo)2 ≥ 3σ(Fo)2, Z(Parameter) = 28, R/Rw = 0,044/0,059.Die Verbindung kristallisiert in einem eigenen Strukturtyp, der gewellte Schichten von ∞2[Na7(OH)52+] enthält, die über I- verknüpft sind.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1185-1188 
    ISSN: 0044-2313
    Keywords: Sodium bromide hydroxide ; synthesis ; single-crystals ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Na5Br(OH)4: Synthesis and Structure of a Compound in the System NaOH/NaBrThe pseudobinary system NaOH/NaBr is investigated by X-ray methods. The structure of the compound Na5Br(OH)4 was solved by single crystal data:Na5Br(OH)4: Pnma, Z = 8, a = 11.846(2) Å, b = 18.782(4) Å, c = 6.431(1) Å, Z(Fo) = 1 202 with (Fo)2 ≥ 3σ(Fo)2, Z(parameter) = 100, R/Rw = 0.030/0.035The compound crystallizes in a new type of structure. Pairs of octahedra around O by 5 Na and 1 H to [Na5(OH)]2 are orientated in such a way to one another that two ions OH- form a parallelogram hinting to unusual bent hydrogen bridge bonding.
    Notes: Das pseudobinäre System NaOH/NaBr wurde röntgenographisch untersucht und die Struktur von Na5Br(OH)4 mittels Röntgenstrukturanalyse an Einkristallen aufgeklärt:Na5Br(OH)4: Pnma, Z = 8, a = 11,846(2) Å, b = 18,782(4) Å, c = 6,431(1) Å, Z(Fo) = 1 202 mit (Fo)2 ≥ 3σ(Fo)2, Z(Parameter) = 100, R/Rw = 0,030/0,035.Auffällig an dem neuen Strukturtyp ist eine paarweise Anordnung von Oktaedern um O durch 5 Na und 1 H zu [Na5(OH)]2. Je zwei OH- sind so zueinander orientiert, daß auf ungewöhnlich gewinkelte H-Brücken auf zwei gegenüberliegenden Seiten eines Parallelogramms zu schließen ist.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1193-1196 
    ISSN: 0044-2313
    Keywords: Potassium bromide hydroxide ; Rubidium bromide hydroxide ; synthesis ; single-crystals ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: K2Br(OH) and Rb2Br(OH): Two New Ternary Alkali Metal Halide Hydroxides with a Pronounced Structural Relationship to KOH resp. RbOHTwo isotypic compounds K2Br(OH) and Rb2Br(OH) were prepared in the systems KOH/KBr and RbOH/RbBr. Their structures were determined by single crystal X-ray methods:K2Br(OH): P21/m, Z = 2, a = 6.724(1) Å, b = 4.272(4) Å, c = 8.442(2) Å, β = 108.14(2)°, Z(Fo) = 651 with (Fo)2 ≥ 3σ(Fo)2, Z(parameter) = 28, R/Rw = 0.041/0.047Rb2Br(OH): P21/m, Z = 2, a = 6.918(3) Å, b = 4.483(2) Å, c = 8.850(5) Å, β = 108.08(6)°, Z(Fo) = 326 mit (Fo)2 ≥ 3σ(Fo)2, Z(parameter) = 27, R/Rw = 0.074/0.082.The compounds are built up by chains of ∞1[M2(OH)+] connected via Br-. The structure of the chains as well as their orientation to one another show a pronounced relationship to the structures of the room temperature modifications of the isotypic binary hydroxides KOH and RbOH.
    Notes: In den pseudobinären Systemen KOH/KBr und RbOH/RbBr konnten die beiden isotypen Verbindungen K2Br(OH) und Rb2Br(OH) dargestellt werden. Ihre Struktur wurde mittels Röntgenstrukturanalyse an Einkristallen aufgeklärt:K2Br(OH): P21/m, Z = 2, a = 6,724(1) Å, b = 4,272(4) Å, c = 8,442(2) Å, β = 108,14(2)°, Z(Fo) = 651 mit (Fo)2 ≥ 3σ(Fo)2, Z(Parameter) = 28, R/Rw = 0,041/0,047.Rb2Br(OH): P21/m, Z = 2, a = 6,918(3) Å, b = 4,483(2) Å, c = 8,850(5) Å, β = 108,08(6)°, Z(Fo) = 326 mit (Fo)2 ≥ 3σ(Fo)2, Z(Parameter) = 27, R/Rw = 0,074/0,082.Die Verbindungen sind aus isolierten Strängen von ∞1[M2(OH)+] aufgebaut, die durch Br- verknüpft werden. Sowohl der Aufbau der einzelnen Stränge als auch ihre Orientierung zueinander zeigen eine deutliche Verwandtschaft zum Aufbau der Raumtemperaturform der ebenfalls isotypen binären Hydroxide KOH und RbOH.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1552-1557 
    ISSN: 0044-2313
    Keywords: Chlorine Nitrate ; Trifluormethylchloroiodinenitrate ; Trifluormethyliodinedinitrate ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of Chlorine Nitrate with CF3I: Isolation of Trifluormethylchloroiodinenitrate CF3I(Cl)ONO2 and the Crystal Structure of Trifluormethyliodinedinitrate CF3I(ONO2)2CF3I reacts with ClONO2 to Iodine(III)-compounds. After an addition CF3I(Cl)ONO2 is isolated and characterized by vibrational spectra. With surplus ClONO2 it is formed CF3I(ONO2)2.CF3I(ONO2)2 crystallizes monoclinic in the space group P21/c with the cell parameters a = 1 024.3(6) pm, b = 873.5(6) pm, c = 873.4(6) pm and Z = 4.We measered following bonding distances: I—O: 207.3(3) and 220.8(2) pm, I—C: 221.1(4) pm and N—O: from 119.1(4) to 141.5(3) pm.Through an intermolecular I ··· O-contact the central iodine becomes a distorted plane geometry.
    Notes: CF3I reagiert mit ClONO2 in einer oxidativen Additionsreaktion zu Iod(III)-Verbindungen. Das Additionsprodukt CF3I(Cl)ONO2 wird isoliert und schwingungsspektroskopisch charaktersiert. Mit überschüssigem ClONO2 bildet sich CF3I(ONO2)2.CF3I(ONO2)2 kristallisiert monoklin in der Raumgruppe P21/c mit a = 1 024,3(6) pm, b = 873,5(6) pm, c = 873,4(6) pm und Z = 4.Es werden folgende Bindungslängen gemessen: I—O: 207,3(3) bzw. 220,8(2) pm, I—C: 221,2(4) pm und N—O: 119,1(4) bis 141,5(3) pm.Durch einen intermolekularen I ··· O-Kontakt erlangt das zentrale Iodatom eine verzerrt-planare Umgebung.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 101-104 
    ISSN: 0044-2313
    Keywords: Dimethyldi(N-Methylimidazolium)silicon bromide ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure Determination of Dimethyldi-(N-Methylimidazolium)silicon BromideThe reaction of dibromodimethylsilane with n-methylimidazole (NMI) leads to a 1:2 compound stable at room temperature. The reaction was carried out at room temperature and colorless, moisture sensitive crystals were obtained by sublimation. The addition compound crystallizes in the orthorhombic space group Pcam (No. 57) with lattice constants a = 1 110 96(8) pm, b = 1 142.3(2) pm and c = 1 238.9(3) pm. For 1 317 independent reflections, measured at 21°C, the structure could be refined to R = 0.040 and Rw = 0.041.
    Notes: Die Reaktion von Dibromdimethylsilan mit N-Methylimidazol (NMI) führt zu einer bei Raumtemperatur stabilen 1:2-Verbindung. Die Umsetzung wurde bei Raumtemperatur durchgeführt, und durch Sublimation ließen sich farblose, feuchtigkeitsempfindliche Einkristalle der Verbindung erhalten. Die Additionsverbindung kristallisiert in der orthorhombischen Raumgruppe Pcam (Nr. 57) mit den Gitterkonstanten a = 1 110,96(8) pm, b = 1 142,3(2) pm und c = 1 238,9(3) pm. Unter Verwendung von 1 317 symmetrieunabhängigen Reflexen konnte die Struktur, gemessen bei 21°C, bis auf R = 0,040 und Rw = 0,041 verfeinert werden.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 131-136 
    ISSN: 0044-2313
    Keywords: Tetraselenium(2+) bis(tetrachlorooxomolybdate)-(2-) ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Crystal Structure, and Phase Transition of Se4(MoOCl4)2Dark green, very air sensitive crystals of Se4(MoOCl4)2 are formed from selenium and MoOCl4 at 190°C in a sealed, evacuated glass ampoule in quantitative yield. The structure is built of nearly square planar Se42+ ions and centrosymmetric dimeric MoOCl4- ions which are linked by bridging Cl atoms. At -21°C Se4(MoOCl4)2 undergoes a reversible solid state phase transition of first order. Structure determinations at -70°C and 23°C show that during the phase transition the structures of the ions remain unchanged, while the orientations of the ions with respect to each other change in such a way that in the low temperature form the Se42+ ions obtain a higher coordination number by Cl and O atoms of neighboring MoOCl4- ions.
    Notes: Bei 190°C entstehen aus Selen und MoOCl4 in einer evakuierten, zugeschmolzenen Glasampulle in quantitativer Ausbeute dunkelgrüne, sehr hydrolyseempfindliche Kristalle von Se4(MoOCl4)2. Die Struktur ist aus nahezu quadratisch planaren Se42+-Ionen und aus zentrosymmetrischen, über verbrückende Chloratome dimerisierten (MoOCl4-)2-Ionen aufgebaut. Bei -21°C durchläuft Se4(MoOCl4)2 eine reversible, diskontinuierliche Phasenumwandlung nach der 1. Ordnung. Strukturbestimmungen bei -70°C und bei 23°C zeigen, daß beim Phasenübergang die Strukturen der Ionen erhalten bleiben, sich jedoch die Orientierungen der Ionen zueinander in der Weise ändern, daß in der Tieftemperaturform die Se42+-Ionen eine höhere Koordination durch O- und Cl-Atome benachbarter MoOCl4--Ionen erhalten.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 143-148 
    ISSN: 0044-2313
    Keywords: Tetramethylarsoniumiodide ; crystal structure ; phase transitions ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structure and Phase Transitions of As(CH3)4IThe crystal structure of α-As(CH3)4I at room temperature was determined using single crystal data: cubic, space group Pa3, a = 1 198.0(2) pm. Therefore α-As(CH3)4I displays a novel crystal structure, which is not comparable to known AB-Typ structures with respect to the arrangement of anions and the baricenters of the complex cations. Differential thermal analysis showed three phase transitions at 103, 175 and 215°C. The lattice parameters of the high temperature phases (temperature dependent Guinier measurements) are: β-As(CH3)4I (tetragonal): a = 845.2(2) pm, c = 615.0(2) pm; γ-As(CH3)4I (hexagonal): a = 737.7(2) pm, c = 1 082.2(3) pm; and to δ-As(CH3)4I (hexagonal): a = 705.8(2) pm, c = 1 147(1) pm. β-and γ-As[(CH3)]4I are isotypic to N(CH3)4Cl and As(CH3)4Br, respectively.
    Notes: Die Struktur von α-As(CH3)4I wurde an Einkristallen bei Raumtemperatur bestimmt: kubisch, RG: Pa3, a = 1 198,0(2) pm. Danach hat α-As(CH3)4I eine neuartige Kristallstruktur, die sich bezüglich der Anordnung von Anionen und Schwerpunkten der komplexen Kationen auf keinen bekannten AB-Typ zurückführen läßt. Mittels DTA wurden drei Phasenumwandlungen bei 103, 175 und 215°C gefunden. Die Gitterkonstanten der Hochtemperaturphasen (Heizguinier-aufnahmen) betragen für β-As(CH3)4I (tetragonal): a = 845,2(2) pm, c = 615,0(2) pm; für γ-As(CH3)4I (hexagonal): a = 737,7(2) pm, c = 1 082,2(3) pm; und für γ-As(CH3)4I (hexagonal): a = 705,8(2) pm, c = 1 147(1) pm. β- und γ-As(CH3)4I sind isotyp zu N(CH3)4Cl bzw. As(CH3)4Br.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 72-76 
    ISSN: 0044-2313
    Keywords: Dithiocarbamate complexes of cobalt and copper ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Deprotonated Dithiocarbamic Acid Esters as Thiolate S-Donor Ligands. Structures of Ph(H)NC(S)SMe, Co(PhNC(S)SMe)3, and Cu6(PhNC(S)SMe)6The reaction of N-phenyl-S-methyldithiocarbamate, PhN(H)C(=S)SMe, (1) with cobalt(II) and copper(II) salts yields the monomeric compound CoIII(PhNC(S)SMe)3 (2) and the hexameric compound Cu6I(PhNC(S)SMe)6 (3). These complexes contain the negatively charged imino-thiolate ligand PhN=C(—S)SMe, which has been formed by deprotonation of 1. The crystal structures of 1-3 have been determined. 1 forms centrosymmetrical dimers through N—H … S bridge bonds, the conformation in the solid state and in solution is Z,E′. CoIII shows in 2 a trigonal-antiprismatic coordination, with the ligands acting as N,S-chelates. 3 contains an octahedral Cu6-core with Cu … Cu-distances ranging from 276.3(5) to 305.7(4) pm. Each copper center is trigonally coordinated to one nitrogen and two sulfur atoms of three different ligands.Crystal data: 1, triclinic, space group P1, a = 590.5(6), b = 869.0(1), c = 968.5(9) pm, α = 67.29(8), β = 78.44(8), γ = 81.64(9)°, Z = 2, 1 775 reflections, R(Rw) = 0.0317(0.032). 2, orthorhombic, space group Pbca, a = 978.0(2), b = 1 842.9(4), c = 3 059.7(6) pm, Z = 8, 1 129 reflections, R(Rw) = 0.0997(0.0886). 3, monoclinic, space group P21/c, a = 1 363.1(3), b = 1 342.8(3), c = 1 671.9(3) pm, β = 103.48°, Z = 2, 1 374 reflections, R(Rw) = 0.0708(0.0617).
    Notes: Die Reaktion von N-Phenyl-S-methyl-dithiocarbaminsäureester, PhN(H)C(=S)SMe (1) mit Cobalt- und Kupfersalzen ergibt monomeres CoIII(PhNC(S)SMe)3 (2) und hexameres Cu6I(PhNC(S)SMe)6 (3). 2 und 3 enthalten den aus 1 durch Deprotonierung entstandenen anionischen Liganden PhN=C(—S)SMe. Die Kristallstrukturen von 1-3 wurden ermittelt. 1 bildet über N—H … S-Brückenbindungen zentrosymmetrische Dimere und liegt im festen Zustand und auch in Lösung als Z,E′-Konformer vor. Die Koordinationssphäre von 2 ist trigonal-antiprismatisch; die Liganden sind als N,S-Chelat gebunden, mit facialer Anordnung gleichartiger Donorzentren. 3 enthält als Kern eine verzerrt oktaedrische Cu6-Einheit mit Cu … Cu-Abständen von 276,3(5) bis 305,7(4) pm. Jedes Kupferatom ist von zwei Schwefelatomen und einem Stickstoffatom dreier verschiedener Liganden koordiniert. Die Schwefelatome haben verbrückende Funktion.Kristalldaten: 1, triklin, Raumgruppe P1, a = 590,5(6), b = 869,0(1), c = 968,5(9) pm, α = 67,29(8), β = 78,44(8), γ = 81,64(9)°, Z = 2, 1 775 Reflexe, R(Rw) = 0,0317(0,032). 2, orthorhombisch, Raumgruppe Pbca, a = 978,0(2), b = 1842,9(4), c = 3 059,7(6) pm, Z = 8, 1 129 Reflexe, R(Rw) = 0,0997(0,0886). 3, monoklin, Raumgruppe P21/c, a = 1 363,1(3), b = 1 342,8(3), c = 1 671,9(3) pm, β = 103,48°, Z = 2, 1 374 Reflexe, R(Rw) = 0,0708(0,0617).
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    Zeitschrift für anorganische Chemie 621 (1995), S. 137-142 
    ISSN: 0044-2313
    Keywords: Potassium amido trioxogermanate ; single crystals ; crystal structure ; hydrogen bridge bonding ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Potassium Amido Trioxo Germanates(IV) - Hydrogen Bridge Bonds in K3GeO3NH2 and K3GeO3NH2 · KNH2Colorless crystals of K3GeO3NH2 and of K3GeO3NH2 · KNH2 were obtained by the reaction of KNH2 with GeO2 in supercritical ammonia at 450°C and pNH3 = 6 kbar in high-pressure autoclaves within 15 resp. 5 days. The crystal structures of both compounds were solved by X-ray single crystal methods.K3GeO3NH2: P1, a = 6.390(1) Å, b = 6.684(1) Å, c = 7.206(1) Å, α = 96.47(1)°, β = 101.66(1)°, γ = 91.66(1)°, Z = 2, R/Rw = 0.020/0.022, N(I) ≥ 2σ(I) = 3023, N(Var.) = 82 K3GeO3NH2 · KNH2: P21/c, a = 10.982(6) Å, b = 6.429(1) Å, c = 12.256(8) Å, β = 106.12(1)°, Z = 4, R/Rw = 0.022/0.029, N(F) ≥ 3σ(F) = 1745, N(Var.) = 107.In K3GeO3NH2 tetrahedral ions GeO3NH23- are connected to chains by N—H … O bridge bonds with 2.18 Å ≤ d(H … O) ≤ 2.40 Å for d(N—H) ≡ 1.0 Å and by potassium ions while in K3GeO3NH2 · KNH2 bridge bonds between NH2 groups of GeO3NH23- and NH2- ions as acceptors occur with 2.41 Å ≤ d((N—)H … NH2-) ≤ 2.61 Å for d(N—H) ≡ 1.0 Å.
    Notes: Farblose Kristalle von K3GeO3NH2 und von K3GeO3NH2 · KNH2 wurden durch Umsetzung von KNH2 mit GeO2 in überkritischem Ammoniak bei 450°C und pNH3 = 6 kbar in Hochdruckautoklaven innerhalb von 15 bzw. 5 Tagen erhalten. Die Atomanordnungen beider Verbindungen konnten über Röntgenstrukturanalysen an Einkristallen geklärt werden.K3GeO3NH2: P1, a = 6,390(1) Å, b = 6,684(1) Å, c = 7,206(1) Å, α = 96,47(1)°, β = 101,66(1)°, γ = 91,66(1)°, Z = 2, R/Rw = 0,020/0,022, N(I) ≥ 2σ(I) = 3023, N(Var.) = 82 K3GeO3NH2 · KNH2: P21/c, a = 10,982(6) Å, b = 6,429(1) Å, c = 12,256(8) Å, β = 106,12(1)°, Z = 4, R/Rw = 0,022/0,029, N(F) ≥ 3σ(F) = 1745, N(Var.) = 107.In K3GeO3NH2 sind tetraedrische Anionen GeO3NH23- über H-Brückenbindungen N—H … O zu Ketten verknüpft mit 2,18 Å ≤ d(H … O) ≤ 2,40 Å bei d(N—H) ≡ 1,0 Å, die über Kalium zusammengehalten werden, während in K3GeO3NH2 · KNH2 Brückenbindungen zwischen NH2 von GeO3NH23- und eingelagertem NH2- auftreten mit 2,41 Å ≤ d((N—)H … NH2-) ≤ 2,61 Å bei d(N—H) ≡ 1,0 Å.
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  • 36
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    Zeitschrift für anorganische Chemie 621 (1995), S. 479-483 
    ISSN: 0044-2313
    Keywords: Tetraphosphorus heptoxide monosulfide ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses and Characterization of P4O7SP4O7S was synthesized for the first time and characterized by X-ray structure determination (single-crystal methods) and 31P-n.m.r. (solution and MAS-solid) (P1; a = 687.2(1); b = 718.2(1); c = 809.1(1) pm; α = 92.58(1)°; β = 104.43(1)°; γ = 94.82(2)°; 2 907 diffractometer data; R1 = 0.030; wR2 = 0.102). The different influences of terminally bound oxygen and sulfur on the geometry of the P4O6 cage are discussed.
    Notes: P4O7S wurde erstmals dargestellt und durch Röntgenstrukturanalyse an Einkristallen sowie 31P-NMR (Lösung und MAS-Festkörper) charakterisiert (P1; a = 687,2(1); b = 718,2(1); c = 809,1(1) pm; α = 92,58(1)°; β = 104,43(1)°; γ = 94,82(2)°; 2 907 Diffraktometerdaten; R1 = 0,030; wR2 = 0,102). Der unterschiedliche Einfluß von terminalem Sauerstoff und Schwefel auf die Geometrie des Käfigs in P4O7S wird diskutiert.
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  • 37
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1025-1032 
    ISSN: 0044-2313
    Keywords: Barium iron fluoride ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ba7Fe6F32 · 2H2O: isolierte [Fe3F16]7--Trimere in einer neuen Verbindung vom Defekt-Jarlit-TypBa7Fe6F32 · 2H2O wurde aus wäßriger HF-Lösung in einer Teflon-Bombe (Berghof) bei 180°C dargestellt. Ein teilweiser F-/OH--Austausch erfolgt in verdünnterem HF-Medium und führt zu Ba7Fe6F32-x(OH)x · 2H2O. Die Verbindungen kristallisieren im monoklinen System, Raumgruppe C2/m (Z = 2) mit a = 17,023(1) Å, b = 11,482(1) Å, c = 7,624(1) Å, β = 101,13(1)° für x = 0 und a = 17,036(2) Å, b = 11,489(1) Å, c = 7,620(2) Å, β = 101,48(1)° für x ≍ 5,3. Die Struktur wurde aus 2 256 bzw. 1 343 unabhängigen Reflexen für x = 0 bzw. x ≍ 5,3 mit einem Siemens AED2 Vierkreisdiffraktometer (MoKα) bestimmt; für x = 0: R = 0,0235, Rw = 0,0240; für x ≍ 5,3: R = 0,0324, Rw = 0,0335. Die eng mit dem Jarlit-Typ verwandte Struktur wird aus isolierten Oktaedertrimeren [Fe3F16]7- aufgebaut, die durch Ba2+-Ionen verknüpft werden. Die Lage der Anionen und Wassermoleküle wird mittels Valenzband-Rechnungen diskutiert. Magnetische-und Mössbauer-Untersuchungen werden diskutiert.
    Notes: Ba7Fe6F32 · 2H2O was prepared from HF aqueous solution in a teflon bomb (Berghof) at 180°C. A partial exchange F-/OH- can be realized in more diluted HF medium and leads to Ba7Fe6F32-x(OH)x · 2H2O. The compounds crystallize in the monoclinic system, space group C2/m (Z = 2) with a = 17.023(1) Å, b = 11.482(1) Å, c = 7.624(1) Å, β = 101.13(1)° for x = 0 and a = 17.036(2) Å, b = 11.489(1) Å, c = 7.620(2) Å, β = 101.48(1)° for x ≍ 5.3. The structures were determined from 2 256 and 1 343 independent reflections for x = 0 and x ≍ 5.3 respectively, collected with a Siemens AED2 four-circle diffractometer with the MoKα radiation (R = 0.0235 and Rw = 0.0240 for x = 0 and R = 0.0324 and Rw = 0.0335 for x ≍ 5.3). The structure, closely related to that of the Jarlite-type, is built up from isolated octahedra trimers [Fe3F16]7-, connected together by Ba2+-cations. The location of anions and water molecules is discussed from bond valence calculations. Magnetic and Mössbauer studies are reported and discussed.
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  • 38
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1042-1046 
    ISSN: 0044-2313
    Keywords: Tribromoselenium (+) ; Triiodotellurium (+) ; Tetrabromoaluminate (-) ; Tetraiodoaluminate (-) ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: SeBr3[AlBr4] and TeI3[AlI4] - two further Compounds in the SCl3[AlCl4] Structure TypeThe reaction of SeBr4 and AlBr3 in a closed glass ampoule at 150°C yields quantitatively SeBr3[AlBr4] in form of yellow moisture sensitive crystals. From Te, two equivalents of I2, and AlI3 one obtains TeI3[AlI4] in form of dark red, moisture sensitive crystals. Both compounds crystallize monoclinic in the space group Pc (SeBr3[AlBr4]: a = 670.7(7) pm, b = 663.9(5) pm, c = 1 428.6(2) pm, β = 101.21(9)°, TeI3[AlI4]: a = 731.9(1) pm, b = 730.8(1) pm, c = 1 565.5(3) pm, β = 102.01(2)°). They are isotypic and have the SCl3[AlCl4] structure type. The structures are built of tetrahedral AlX4- ions and of pyramidal EX3+ ions (E = S, Se, Te; X = Cl, Br, I). The chalcogen atoms are additionally coordinated by halogen atoms of surrounding AlX4- ions, corresponding to a strongly distorted octahedral coordination EX3+3.
    Notes: Durch Reaktion von SeBr4 mit AlBr3 in einer geschlossenen Ampulle bei 150°C entsteht SeBr3[AlBr4] in Form gelber, hydrolyseempfindlicher Kristalle in quantitativer Ausbeute. Aus Te, AlI3 und zwei Äquivalenten I2 entsteht unter gleichen Bedingungen TeI3[AlI4] in Form dunkelroter, ebenfalls hydrolyseempfindlicher Kristalle. Beide Verbindungen kristallisieren monoklin, Raumgruppe Pc (SeBr3[AlBr4]: a = 670,7(7) pm, b = 663,9(5) pm, c = 1 428,6(2) pm, β = 101,21(9)°, TeI3[AlI4]: a = 731,9(1) pm, b = 730,8(1) pm, c = 1 565,5(3) pm, β = 102,01(2)°). Sie sind isotyp zu SCl3[AlCl4]. Die Strukturen sind aus tetraedrischen AlX4--Ionen und aus pyramidalen EX3+-Ionen (E = S, Se, Te; X = Cl, Br, I) aufgebaut. Das Chalkogen ist dabei von Halogenatomen benachbarter AlX4--Ionen zusätzlich so koordiniert, daß es eine stark verzerrte oktaedrische EX3+3-Koordination aufweist.
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  • 39
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1047-1052 
    ISSN: 0044-2313
    Keywords: Zirconium fluoride ; hafnium fluoride ; ternary fluorides ; KPdMIVF7 (MIV = Zr, Hf) ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structure of KPdMIVF7 (MIV = Zr, Hf)Blue single crystals of KPdZrF7 are obtained by heating the binary fluorides in sealed Pt-tubes under dry argon (solid state reaction, T ≍ 720°C, t ≍ 14 d). The compound crystallizes orthorhombically in the space group Pnna-D2h6 (Nr. 52); lattice parameters are a = 1 132.3(5) pm, b = 797.5(2) pm, c = 639.8(1) pm; Z = 4 (Four cycle diffractometer data, AED2). According to [F4PdF2/1ZrF5] distortet [PdF6]-octaedra are connected with pentagonal-bipyramidal [ZrF7]-polyhedra via two bridging F-, resulting in [PdZrF11]-groups. These [PdZrF11]-groups built up a threedimensional-network with K+ in its spacings. KPdHfF7 crystallizes isotypically (a = 1 136.1(3) pm, b = 796.4(2) pm und c = 638.8(1) pm; four cycle diffractometer data, AED2).
    Notes: Durch Tempern der binären Fluoride im verschweißten Pt-Rohr unter Schutzgas (Ar, Festkörperreaktion, T ≍ 720°C, t ≍ 14d) erhält man blaue Einkristalle von KPdZrF7 [eigener Strukturtyp, orthorhombisch, Pnna-D2h6 (Nr. 52); a = 1 132,3(5) pm, b = 797,5(2) pm, c = 639,8(1) pm; Z = 4; Vierkreisdiffraktometerdaten AED2]. Pd2+ ist verzerrt oktaedrisch von 6 F- umgeben, wohingegen Zr4+ pentagonalbipyramidal von 7 F- koordiniert wird. Beide Koordinationspolyeder sind gemäß [F4PdF2/1ZrF5] kantenverknüpft und bilden mit weiteren solcher [PdZrF11]-Einheiten durch Eckenverknüpfung ein dreidimensionales Raumnetz, in dessen Lücken K+ eingelagert ist. Nach Vierkreisdiffraktometerdaten (AED2) kristallisiert KPdHfF7 isotyp (a = 1 136,1(3) pm, b = 796,4(2) pm und c = 638,8(1) pm).
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  • 40
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1053-1057 
    ISSN: 0044-2313
    Keywords: Lead iron fluoride, Pb8FeIIFe2IIIF24 ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Kristallstruktur von Pb8FeIIFe2IIIF24: eine geordnete fluoritähnliche VerbindungPb8FeIIFe2IIIF24 ist triklin: a = 20,118(3) Å, b = 5,597(1) Å, c = 9,440(2) Å, α = 89,75(2)°, β = 105,79(2)° γ = 89,38(2)°, Z = 2, unkonventionelle Raumgruppe C1. Die Struktur wurde aus Einkristalldaten unter Verwendung von 1 641 unabhängigen Reflexen gelöst (R = 0,048, Rw = 0,051). Sie wird aus Paketen von zwei Untergittern entlang der a-Achse gebildet: fluoritähnlichen [Pb8F10]n6n+-Schichten und unendlichen, aus zwei Metallsorten gebildeten [FeIIFe2IIIF14]n6n- -Doppelketten von eckenverknüpften Oktaedern entlang der b-Achse.
    Notes: Pb8FeIIFe2IIIF24 is triclinic: a = 20.118(3) Å, b = 5.597(1) Å, c = 9.440(2) Å, α = 89.75(2)°, β = 105.79(2)°, α = 89.38(2)°, Z = 2. The structure is solved in the unconventional space group C1, from X-ray single crystal data using 1 641 independent reflections (R = 0.048, Rw = 0.051). It is built up from the stacking of two subnetworks along the a axis: fluorite-like [Pb8F10]n6n+ layers and infinite dimetallic [FeIIFe2IIIF14]n6n- double-chains of corner-sharing octahedra running along the b axis.
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  • 41
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1058-1062 
    ISSN: 0044-2313
    Keywords: Sodium phenoxide · 2 phenol ; crystal structure ; system sodium phenoxide/phenol ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Compound Sodium Phenoxide · 2 Phenol in the System of its ComponentsIn the whole system of sodiumphenoxide/phenol the substance sodium phenoxide · 2 phenol is found to be the only compound between the two components. Single crystalls could be obtained by using the growing method according to Bridgman-Stockbarger.The crystal structure of PhONa · 2PhOH contains two different chains. In both of them sodium is coordinated in form of a distorted tetrahedron; in the first one by 4 oxygen, in the second one by 3 oxygen atoms and a phenoxid molecule, which is linked to sodium via its π-electrons. In the result of this realizations conclusions concerning the Kolbe-Schmitt-Synthesis are possible.
    Notes: Die Phase Natriumphenolat · 2 Phenol stellt im gesamten System Natriumphenolat/Phenol die einzige Verbindungsbildung der beiden Komponenten dar. Das Bridgman-Stockbarger-Verfahren führte zur erfolgreichen Züchtung von Kristallen.Die Kristallstruktur der Substanz setzt sich aus zwei verschiedenen Ketten zusammen. In beiden ist Natrium verzerrt tetraedrisch koordiniert; zum einen durch 4 Sauerstoffe, zum anderen durch 3 Sauerstoffe und einen Phenylring, mit dessen π-Elektronensystem das Metallatom in einer bindenden Wechselwirkung steht. Die Kenntnis der Struktur ermöglicht Aussagen hinsichtlich der Kolbe-Schmitt-Synthese.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 511-515 
    ISSN: 0044-2313
    Keywords: Nitridochromate(V) ; preparation ; crystal structure ; magnetic properties ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ba5[CrN4]N: The First Nitridochromate(V)Ba5[CrN4]N is prepared by reaction of mixtures of Li3N, Ba3N2 and CrN/Cr2N (1 : 1) (molar ratio Li : Ba : Cr = 3 : 5 : 1) in tantalum crucibles at 700°C with flowing nitrogen (1 atm) within a period of 48 h. After cooling down to room temperature (60°C/h) black-shining single crystals of the ternary phase with a platy habit are obtained (monoclinic, C2/m; a = 1054.0(2) pm, b = 1170.9(3) pm, c = 937.7(2) pm, b̃ = 110,79(2)°; Z = 4). The crystal structure contains isolated complex anions [CrVN4]7- which nearly satisfy the ideal tetrahedral symmetry (Cr—N [pm]: 2 × 175.3(4), 2 × 175.8(5); N—Cr—N [°]: 106.8(2), 109.5(2), 2 × 109.9(2), 2 × 110,3(2)). The coordination sphere for each of the terminal nitride functions of the complex anions is completed by five neighbouring Ba2+ ions (distorted CrBa5 octahedra). The octahedra are connected via common CrBa2 faces as well as CrBa edges thereby forming condensed tetrameric octahedral groups. The isolated nitride ions which are also present in the crystal structure of Ba5[CrN4]N are in an octahedral environment of Ba2+ ions.The presence of a d1-System (Cr(V)) is confirmed by magnetic susceptibility data.
    Notes: Ba5[CrN4]N wird durch Umsetzung von Mischungen aus Li3N, Ba3N2 und CrN/Cr2N (1 : 1) im molaren Verhältnis Li: Ba: Cr = 3 : 5 : 1 bei 700°C im Tantaltiegel unter strömendem Sticksktoff (1 atm) dargestellt. Die Reaktionszeit beträgt 48 h. Nach Abkühlen auf Raumtemperatur (60°C/h) liegt die ternäre Phase in Form schwarz-glänzender Kristalle mit plattigem Habitus vor (monoklin, C2/m; a = 1054,0(2) pm, b = 1170,9(3) pm, c = 937,7(2) pm, b̃ = 110,79(2)°; Z = 4). Die Kristallstruktur enthält isolierte komplexe Anionen [CrVN4]7- mit nahezu idealer Tetraedersymmetrie (Cr—N [pm]: 2 × 175,3(4), 2 × 175,8(5); N—Cr—N [°]: 106,8(2), 109,5(2), 2 × 109,9(2), 2 × 110,3(2)). Die Koordinationssphäre der terminalen Nitrid-Funktionen der komplexen Anionen wird durch je fünf benachbarte Ba-Ionen zu verzerrten CrBa5-Oktaedern vervollständigt. Je zwei dieser Oktaeder sind über gemeinsame CrBa2-Flächen zu dimeren Einheiten verknüpft, die über gemeinsame CrBa-Kanten zu tetrameren Oktaedergruppierungen kondensiert sind. Die in der Kristallstruktur von Ba5[CrN4]N zusätzlich enthaltenen, isolierten Nitridionen sind oktaedrisch von Barium umgeben.Das Vorliegen eines d1-Systems (Cr(V)) wird durch Messungen der magnetischen Suszeptibilität belegt.
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  • 43
    ISSN: 0044-2313
    Keywords: Alkali metal boride carbide ; intercalated heterographite ; crystal structure ; electron density ; physical properties ; topochemical reactions ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: LiBC  -  A Completely Intercalated HeterographiteLiBC is a new compound composed only from light main group elements. LiBC is synthesized from the elements in sealed niobium ampoules at 770 K, and short annealing at 1 770 K, forming hexagonal platelets with golden lustre. According to Li+(BC)-, boron and carbon form planar hetero graphite layers of the isoelectronic hexagonal boron nitride type. The inter-layer regions are completely filled by lithium (P63/mmc; a = 275.2 pm; c = 705.8 pm; hP6; ZrBeSi type). The deformation density of the valence electrons prove the π character of the B—C bonds, as well as a polarization according to (BC-). Chemical and physical properties indicate a certain range of homogeneity x(Li) ≤ 1. The thermal decomposition and chemical reactions lead to BC products not yet characterized. The oxidation of LiBC obviously runs by a mechanism similar to that of graphite.
    Notes: LiBC ist eine neue, nur aus den leichten Elementen der Hauptgruppen bestehende Verbindung. Sie entsteht aus den Elementen in verschweißten Niobampullen bei 770 K und anschließendem kurzzeitigen Tempern bei 1 770 K in Form goldglänzender, hexagonaler Plättchen. Entsprechend Li+(BN)- bilden Bor und Kohlenstoff ebene Heterographitschichten vom Typ des isoelektronischen hexagonalen Bornitrids. Die Bereiche zwischen den Schichten sind durch Lithium vollständig aufgefüllt (P63/mmc; a = 275.2 pm; c = 705.8 pm; hP6; ZrBeSi-Typ). Die Deformationsdichte der Valenzelektronen beweist für die B—C-Bindungen π-Charakter und Polarisierung entsprechend (BC-). Nach chemischen und physikalischen Eigenschaften zeigt LiBC eine gewisse Phasenbreite x(Li) ≤ 1. Beim thermischen Abbau und bei chemischen Reaktionen entstehen bisher noch nicht charakterisierte BC-Produkte. Die Oxidation von LiBC verläuft offenbar nach einem ähnlichen Mechanismus wie bei Graphit.
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  • 44
    ISSN: 0044-2313
    Keywords: Arsenidostannates ; alkali - alkaline earth substitution ; [SnAs] nets isostructural grey arsenic ; crystal structure ; Zintl phases ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Arsenidostannates with [SnAs] Nets Isostructural to Grey Arsenic: Synthesis and Crystal Structure of Na[Sn2As2], Na0.3Ca0.7[Sn2As2], Na0.4Sr0.6[Sn2As2], Na0.6Ba0.4[Sn2As2], and K0.3Sr0.7[Sn2As2]The metallic lustrous compounds Na[Sn2As2], Na0.3Ca0.7[Sn2As2], Na0.4Sr0.6[Sn2As2], Na0.6Ba0.4[Sn2As2] and K0.3Sr0.7[Sn2As2] were prepared from melts of mixtures of the elements. The compounds crystallize in the trigonal system (space group R3m, No. 166, Z = 3) with lattice constants see in “Inhaltsübersicht”. The structures are isotypic to Sr[Sn2As2] containing puckered ∞2[SnAs] nets which are stacked with a sequence of six layers. The E(I)/E(II) atoms are located between each second ∞2[SnAs] layer in trigonal antiprismatic interstices formed by As atoms. In the resulting ∞2[Sn2As2] double layers the ∞2[SnAs] nets are stacked in such a way that additional Sn - Sn contacts arise.
    Notes: Die metallisch glänzenden Verbindungen Na[Sn2As2], Na0,3Ca0,7[Sn2As2], Na0,4Sr0,6[Sn2As2], Na0,6Ba0,4[Sn2As2] und K0,3Sr0,7[Sn2As2] wurden aus Schmelzreaktionen, ausgehend von Gemengen der Elemente erhalten. Die Verbindungen kristallisieren trigonal, Raumgruppe R3m (Nr. 166), Z = 3, mit den Gitterkonstanten (pm): TextNa[Sn2As2]a = 400,6(2)c = 2758,1(5)c/a = 6,885Na0,3Ca0,7[Sn2As2]a = 410,1(2)c = 2648,6(5)c/a = 6,458Na0,4Sr0,6[Sn2As2]a = 411,7(2)c = 2718,5(5)c/a = 6,603Na0,6Ba0,4[Sn2As2]a = 409,2(2)c = 2793,4(5)c/a = 6,826K0,3Sr0,7[Sn2As2]a = 417,6(2)c = 2714,6(5)c/a = 6,500 - In den im Sr[Sn2As2]-Typ kristallisierenden Verbindungen sind zum grauen Arsen isostrukturelle ∞1[SnAs]-Netze ausgebildet, die senkrecht zur c-Achse eine Sechserschichtfolge aufweisen. Jeder zweite ∞1[SnAs]-Schichtzwischenraum ist von E(I)/E(II)-Atomen in trigonal antiprismatischen Lücken aus As-Atomen belegt. In den resultierenden ∞2[Sn2As2]-Doppelschichtpaketen sind die benachbarten ∞2[SnAs]-Netze so zueinander orientiert, daß relativ kurze Sn - Sn-Kontake ausgebildet werden.
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  • 45
    ISSN: 0044-2313
    Keywords: Phthalocyanines ; zirconium complexes ; cyclovoltammetry ; optical spectra ; vibrational spectra ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zirconiumphthalocyanines: Synthesis and Properties of Chloride Ligated Phthalocyanines of Ter- and Quadrivalent Zirconium; Crystal Structure of cis-Di(triphenylphosphine)iminium-tri(chloro)phthalocyaninato(2-)zirconate(IV)-di(dichloromethane)cis-Di(chloro)phthalocyaninato(2-)zirconium(IV) is obtained by the reaction of ZrCl4 with phthalodinitrile in 1-chloronaphthaline at 230°C. It reacts with molten di(triphenylphosphine)iminiumchloride ((PNP)Cl) yielding cis-di(triphenylphosphine)iminium-tri(chloro)phthalocyaninato(2-)zirconate(IV), cis-(PNP)[ZrCl3Pc2-]. This crystallizes with two molecules of dichloromethane in the monoclinic space group P21/n with the lattice constants a = 15.219(4) Å, b = 20.262(10) Å, c = 20.719(4) Å, b̃ = 93.46(2)°, Z = 4. The seven coordinated Zr atom is situated in a “square base-trigonal cap” polyhedron. The plane of the three chlorine atoms runs parallel to the plane of the four isoindole nitrogen atoms Niso. The Zr-Cl distances range from 2.49 to 2.55 Å, the Zr—Niso distances from 2.26 to 2.29 Å. Due to ion packing effects the Pc2- ligand shows an asymmetrical convex distortion. The PNP cation adopts the bent conformation. The P—N—P angle is 139°, the P—N distance 1.58 Å. As confirmed by the cyclovoltammograms cis-(PNP)[ZrCl3Pc2-] is oxidized (anodically or chemically by Cl2) to yield cis-tri(chloro)phthalocyaninato(1-)zirconium(IV) and reduced (cathodically or chemically by [BH4]-) yielding chlorophthalocyaninato(2-)zirconium(III) and cis-di(triphenylphosphine)iminium-di(chloro)phthalocyaninato(2-)zirconate(III). The optical spectra show the typical π-π*-transitions of the Pc2- resp. Pc- ligand not much affected by the different states of oxidation and coordination of zirconium. The same is true for the vibrational spectra of the Pc2- resp. Pc- ligand. In the f.i.r. spectra between 350 and 150 cm-1 the asym. and sym. Zr—Cl stretching and Cl—Zr—Cl deformation vibration as well as the asym. Zr—N stretching vibration of the [ZrClxN4] skeleton (x = 1-3) is assigned.
    Notes: cis-Di(chloro)phthalocyaninato(2-)zirconium(IV) bildet sich bei der Reaktion von ZrCl4 mit Phthalodinitril in 1-Chlornaphthalin bei 230°C. Es reagiert mit geschmolzenem Di(triphenylphosphin)iminiumchlorid ((PNP)Cl) zu cis-Di(triphenylphosphin)iminium-tri(chloro)phthalocyaninato(2-)-zirconat(IV), cis-(PNP)[ZrCl3Pc2-]. Dieses kristallisiert mit zwei Solvatmolekülen Dichlormethan in der monoklinen Raumgruppe P21/n mit den Gitterkonstanten a = 15.219(4) Å, b = 20,262(10) Å, c = 20,719(4) Å, b̃ = 93,46(2)°, Z = 4. Das siebenfach koordinierte Zr-Atom befindet sich in einem nach Art eines „square base-trigonal cap“ aufgespannten Koordinationspolyeder. Die Ebene der drei Chlor-Atome verläuft parallel zur Ebene der vier Isoindol-N-Atome (Niso). Die (Zr—Cl)-Abstände variieren zwischen 2,49 und 2,55 Å, die (Zr—Niso)-Abstände zwischen 2,26 und 2,29 Å. Aufgrund von Ionenpackungseffekten ist der Pc2--Ligand unsymmetrisch konvex verzerrt. Das (PNP)-Kation liegt in der gewinkelten Konformation vor. Der (P—N—P)-Winkel beträgt 139°, der (P—N)-Abstand 1,58 Å. In Übereinstimmung mit den Cyclovoltammogrammen bildet sich aus cis-(PNP)[ZrCl3Pc2-] durch anodische oder chemische (mit Cl2) Oxydation cis-Tri(chloro)phthalocyaninato(1-)zirconium(IV) und durch kathodische oder chemische (mit [BH4]-) Reduktion Chlorophthalocyaninato(2-)zirconium(III) und cis-Di(triphenylphosphin)iminium-di(chloro)-phthalocyaninato(2-)zirconat(III). Die optischen Spektren zeigen die typischen π-π*-Übergänge des Pc2--bzw. Pc--Liganden. Die verschiedenen Oxydations- und Koordinationszustände des Zirconiums üben hierauf keinen großen Einfluß aus. Dieses gilt auch für die Schwingungsspektren des Pc2-- bzw. Pc--Liganden. In den FIR-Spektren werden zwischen 350 und 150 cm-1 für das [ZrClxN4]-Gerüst (x = 1-3) die asym. und sym. (Zr—Cl)-Valenz- und (Cl—Zr—Cl)-Deformationsschwingung sowie die asym. (Zr—N)-Valenzschwingung zugeordnet.
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  • 46
    ISSN: 0044-2313
    Keywords: Mulinuclear phosphido-bridged Ag- and Zn-complexes ; Ag—P-rings ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Phosphido-bridged Multinuclear Complexes of Ag and Zn. The Crystal Structures of [Ag3(PPh2)3(PnBu2tBu)3], [Ag4(PPh2)4(PR3)4] (PR3 = PMenPr2, PnPr3), [Ag4(PPh2)4(PEt3)4]n, [Zn4(PPh2)4Cl4(PRR′2)2] (PRR′2 = PMenPr2, PnBu3, PEt2Ph), [Zn4(PhPSiMe3)4Cl4(C4H8O)2] and [Zn4(PtBu2)4Cl4]AgCl reacts with Ph2PSiMe3 in the presence of tertiary Phosphines (PnBu2tBu, PMenPr2, PnPr3 and PEt3) to form the multinuclear complexes [Ag3(PPh2)3(PnBu2tBu)3] 1, [Ag4(PPh2)4(PR3)4] (PR3 = PMenPr2 2, PnPr3 3) and [Ag4(PPh2)4(PEt3)4]n 4. In analogy to that ZnCl2 reacts with Ph2PSiMe3 and PRR′2 to form the multinuclear complexes [Zn4(PPh2)4Cl4(PRR′2)2] (PRR′2 = PMenPr2 5, PnBu3 6, PEt2Ph 7). Further it was possible to obtain the compounds [Zn4(PhPSiMe3)4Cl4(C4H8O)2] 8 and [Zn4(PtBu2)4Cl4] 9 by reaction of ZnCl2 with PhP(SiMe3)2 and tBu2PSiMe3, respectively. The structures were characterized by X-ray single crystal structure analysis. Crystallographic data see “Inhaltsübersicht”.
    Notes: AgCl reagiert mit Ph2PSiMe3 in Gegenwart der tertiären Phosphane PnBu2tBu, PMenPr2, PnPr3 und PEt3 unter Bildung mehrkerniger Komplexe. Abhängig vom tertiären Phosphan erhält man dabei folgende Verbindungen: [Ag3(PPh2)3(PnBu2tBu)3] 1, [Ag4(PPh2)4(PR3)4] (PR3 = PMenPr2 2, PnPr3 3) und [Ag4(PPh2)4(PEt3)4]n 4. Analog hierzu reagiert ZnCl2 mit Ph2PSiMe3 und PRR′2 zu den Mehrkernkomplexen [Zn4(PPh2)4Cl4(PRR′2)2] (PRR′2 = PMenPr2 5, PnBu3 6, PEt2Ph 7). Ferner konnten durch Umsetzung von ZnCl2 mit PhP(SiMe3)2 bzw. tBu2PSiMe3 die Verbindungen [Zn4(PhPSiMe3)4Cl4(C4H8O)2] 8 und [Zn4(PtBu2)4Cl4] 9 erhalten werden. Die Strukturen von 1-9 konnten durch Kristallstrukturanalysen aufgeklärt werden.(1: Raumgruppe P1 (Nr. 2), a = 1 245,8(6) pm, b = 1 662,0(8) pm, c = 2 159,2(12) pm, α = 77,01(3)°, β = 81,59(3)°, γ = 69,07(3)°, 2: Raumgruppe P21/n (Nr. 14), a = 1 283,7(8) pm, b = 2 102,8(13) pm, c = 1 481,7(9) pm, β = 104,31(5)°, 3: Raumgruppe C2/c (Nr. 15), a = 2 925,4(12) pm, b = 1 297,0(6) pm, c = 2 426,5(9) pm, β = 100,00(3)°, 4: Raumgruppe P1 (Nr. 2), a = 1 046,0(5) pm, b = 1 086,1(7) pm, c = 1 733,0(12) pm, α = 71,76(5)°, β = 88,57(5)°, γ = 87,22(5)°, 5: Raumgruppe I2/a (Nr. 15), a = 2 435,2(9) pm, b = 1 908,3(8) pm, c = 3 534,3(16) pm, β = 97,04(3)°, 6: Raumgruppe C2/c (Nr. 15), a = 2 261,6(15) pm, b = 1 888,9(10) pm, c = 1 810,2(13) pm, β = 108,79(4)°, 7: Raumgruppe P1 (Nr. 2), a = 1 495,9(3) pm, b = 2 005,0(3) pm, c = 2 921,5(9) pm, α = 107,80(2)°, β = 92,36(2)°, γ = 103,99(1)°, 8: Raumgruppe P21/n (Nr. 14), a = 910,2(3) pm, b = 2 568,2(6) pm, c = 1 293,5(6) pm, β = 98,42(3)°, 9: Raumgruppe P21/n (Nr. 14), a = 1 227,3(6) pm, b = 1 205,3(9) pm, c = 1 584,5(7) pm, β = 109,32(3)°).
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  • 47
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1703-1707 
    ISSN: 0044-2313
    Keywords: Potassium hydrogen cyanamide ; synthesis ; crystal structure ; IR-spectroscopy ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation, Crystal Structure, and Properties of Potassium Hydrogen CyanamideFor the preparation of KHCN2 melamine has been reacted with potassium amide in liquid ammonia. After evaporation of the solvent the resulting solid has been transformed at 210°C. KHCN2 (P212121, a = 708.7(2), b = 909.0(2), c = 901.4(2) pm, Z = 8, R = 0.039, wR = 0.016) is yielded as a coarse crystalline product. In the solid K+ and HCN2- ions occur. As expected two significantly differing bond-distances C—N (117.3(5) pm) and HN—C (128.7(5) pm) have been found in the anion. According to IR-spectroscopy a non linear group N—C—N (174.4(4)°) is observed.
    Notes: Zur Darstellung von KHCN2 wurde Melamin mit Kaliumamid in flüssigem Ammoniak umgesetzt und der nach Verdampfen des Lösungsmittels verbleibende Feststoff bei 210°C zur Reaktion gebracht. KHCN2 (P212121, a = 708,7(2), b = 909,0(2), c = 901,4(2) pm, Z = 8, R = 0,039, wR = 0,016) entsteht dabei grobkristallin. Im Festkörper findet man K+ - und HCN2--Ionen. Erwartungsgemäß liegen zwei signifikant unterschiedliche Bindungslängen C—N (117,3(5) pm) und HN—C (128,7(5) pm) im Anion vor. In Übereinstimmung mit IR-spektroskopischen Befunden ist die Gruppierung N—C—N nicht linear (174,4(4)°).
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  • 48
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1723-1726 
    ISSN: 0044-2313
    Keywords: Beryllium dichloride ; dimorphy ; enthalpy ; entropy ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thermochemistry and Structure of Beryllium ChlorideBeCl2 is dimorphous, with a transition point at 405°C. The transition enthalpy and transition entropy have been determined by solution calorimetry: ΔUH° = 2.9 kJmol-1 and ΔUS° = 9.7 JK-1mol-1.The previously known SiS2-type structure of BeCl2 is that of the high temperature phase. The structure of the phase stable at room temperature has been determined from single crystal data. a = 1 062.4(6) pm, c = 1 804(2) pm, I41/acd, Z = 32, R = 0.038 (Mg(NH2)2-type). The structure consists of P4O10-like [Be4Cl6Cl4/2]-units, connected by their terminal anions.
    Notes: BeCl2 ist dimorph, die Umwandlungstemperatur liegt bei 405°C. Aus lösungskalorimetrischen Messungen ergibt sich als Differenz der Lösungsenthalpien eine Umwandlungsenthalpie von ΔUH° = 2,9 kJmol-1 und eine Umwandlungsentropie ΔUS298° = 9,7 JK-1 mol-1.Die bislang bekannte Struktur im SiS2-Typ ist die der Hochtemperaturphase. Die Struktur von bei Raumtemperatur stabilem T-BeCl2 wurde aus Einkristalldaten bestimmt. a = 1 062,4(6) pm, c = 1 804(2) pm, I41/acd, Z = 32, R = 0,038 (Mg(NH2)2-Typ). Es liegen (Be4Cl6Cl4/2)-Einheiten vor, die dem Bauprinzip von P4O10 entsprechen, aber über ihre terminalen Chlorid-Ionen verknüpft sind.
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  • 49
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1708-1714 
    ISSN: 0044-2313
    Keywords: Indium(III) phthalocyanines, nitrito-O,O′ complexes ; cyclic voltammetry ; optical spectra ; vibrational spectra ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: InIII-Phthalocyanines: Synthesis, Properties, and Crystal Structure of Tetra(n-butyl)ammonium-cis-di(nitrito-O,O')phthalocyaninato(2-)indate(III)[In(Cl)Pc2-] reacts with (nBu4N)NO2 in acetone yielding green-blue (nBu4N)cis[In(NO2)2Pc2-], which crystallizes in the monoclinic space group P21/n (No. 14). Both nitrite anions are coordinated as chelating nitrito-O,O'(NO2) ligands to InIII in cis-geometry. Consequently InIII is octa-coordinated within a distorted “quadratic” antiprism and directed towards the Pc2--ligand. One of the NO2 ligands has equivalent N—O bonds similar to free nitrite, while the other has asymmetric N—O bonds. Both (In,O,N,O) rings are approximately planar with a dihedral angle of 80°. The Pc2- ligand is distorted in an asymmetrically convex manner. Partially overlapping pairs of Pc2- ligands related by an inversion center form double layers, which are separated by layers containing the (nBu4N)+ cations. The cyclic voltammogram shows three electrode processes, which are assigned to the redox pairs: Pc3-/Pc2- (-0.94 V) 〈 InI/InIII (-0.78 V) 〈 Pc2-/Pc- (0.64 V). The UV-VIS-NIR spectra and vibrational spectra are discussed.
    Notes: [In(Cl)Pc2-] bildet mit (nBu4N)NO2 in Aceton grün-blaues (nBu4N)cis[In(NO2)2Pc2-], welches monoklin kristallisiert (RG.: P21/n (14)). Die Nitrit-Anionen sind als chelatbildende Nitrito-O,O′ (NO2)-Liganden an InIII in cis-Koordination gebunden. Infolgedessen ist InIII oktakoordiniert und befindet sich in einem verzerrten “quadratischen” Antiprisma auf der dem Pc2--Liganden zugewandten Seite. Einer der (NO2)-Liganden hat ähnlich wie freies Nitrit äquivalente N—O-Bindungen, der andere nichtäquivalente. Beide (In,O,N,O)-Ringe sind nahezu planar (Diederwinkel: 80°). Der Pc2--Ligand ist unsymmetrisch konvex verzerrt. Partiell überlappende Paare einander zugewandter Pc2--Liganden bilden von den (NO2)-Liganden begrenzte Doppelschichten, die von den die (nBu4N)+-Kationen enthaltenden Schichten getrennt sind. Das Zyklovoltammogramm von cis[In(NO2)2Pc2-]- zeigt drei Elektrodenprozesse, die den Redoxpaaren: Pc3-/Pc2- (-0,94 V) 〈 InI/InIII (-0,78 V) 〈 Pc2-/Pc- (0,64 V) zugeordnet werden. Die UV-VIS-NIR- und Schwingungsspektren werden diskutiert.
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  • 50
    ISSN: 0044-2313
    Keywords: Phthalocyanines ; lithium complex ; crystal structure ; cyclic voltammetry ; UV-VIS-NIR spectra ; vibrational spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Lithiumphthalocyanines: Synthesis, Properties, and Crystal Structure of Bis(triphenylphosphine)iminiumphthalocyaninatolithates with Different Conformations of the CationReaction of tri(n-dodecyl)n-butylammoniumphthalocyaninatolithate, (TDBA)[LiPc2-] with bis(triphenylphosphin)iminiumbromide, (PNP)Br in dichloromethane yields (PNP)[LiPc2-]. It crystallizes in the triclinic space group P1 as dichloromethane solvate (1) and in the monoclinic space group P21/n as hydrate (2). The crystal structures of (1) and (2) are reported. Each salt contains two crystallographically slightly different discrete [LiPc2-]- anions, in which the square-planar coordinated Li+ cation is centered within the planar Pc2- ligand (Dav.(Li—Niso) = 1.945 Å). There are three different conformations for the (PNP) cation: (1) only contains the bent conformer (dav.(P—N) = 1.575 Å; ϕ(P—N—P) = 140.8°), while in (2) an hybrid (dav.(P—N) = 1.562 Å; ϕ(P—N—P) = 158.1°) and the linear conformer (dav.(P—N) = 1.547 Å; ϕ(P—N—P) = 176.8°) are present. The very soluble, blue-green salts melt at 265°C without decomposition. In accordance with cyclovoltammetric data thin films of (PNP)[LiPc2-] are oxidized by NO2 or Br2 to yield brown violet [LiPc-]. The electronic absorption spectra and the vibrational spectra are discussed.
    Notes: Tri(n-dodecyl)n-butylammoniumphthalo-cyaninatolithat, (TDBA)[LiPc2-] bildet mit Bis(triphenylphosphin)iminiumbromid, (PNP)Br in Dichlormethan (PNP)[LiPc2-]. Dieses kristallisiert triklin (RG.:P1) als Dichlormethan-Solvat (1) und monoklin (RG.: P21/n) als Hydrat (2). Nach den Röntgenstrukturanalysen von (1) und (2) enthält jedes Salz zwei kristallographisch unterschiedliche, diskrete [LiPc2-]--Anionen, in denen sich das quadratisch-planar koordinierte Li+-Kation im Zentrum des ebenen Pc2--Liganden befindet (Dgem(Li—Niso) = 1,945 Å). Das (PNP)-Kation tritt in drei verschiedenen Konformationen auf: (1) enthält nur das gewinkelte Konformer (dgem(P—N) = 1,575 Å; ϕ(P—N—P) = 140,8°), (2) dagegen neben dem linearen (dgem(P—N) = 1,547 Å; ω(P—N—P) = 176,8°) ein Hybrid-Konformer (dgem(P—N) = 1,562 Å; ϕ(P—N—P) = 158,1°). Die löslichen, blaugrünen Komplexsalze schmelzen unzersetzt bei 265°C. Dünnfilme von (PNP)[LiPc2-] werden in Übereinstimmung mit cyclovoltammetrischen Daten durch NO2 oder Br2 zu braun-violettem [LiPc-] oxydiert. Die elektronischen Absorptions- und Schwingungsspektren werden diskutiert.
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  • 51
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1741-1745 
    ISSN: 0044-2313
    Keywords: Bis(diallylammonium)dichlorocopper(I) nitrate ; allylammonium picrate ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structures of [Cu2Cl2(AA · H+)2](NO3)2 and [AA · H+]Picr- (AA · H+ = Allylammonium; Picr- = Picrat)By an alternating current electro synthesis the crystal-line π-complex [Cu2Cl2(AA · H+)2](NO3)2 has been obtained from CuCl2 · 2H2O, allylamine (AA), and HNO3 in ethanolic solution. X-ray structure analysis revealed that the compound crystallized in the monoclinic system, space group P21/a, a = 7.229(3), b = 7.824(3), c = 26.098(6) Å, γ = 94.46(5)°, Z = 4, R = 0.025 for 2 023 reflections. The crystal structure is built up of CunCln chains which are connected by π-bonding bidentate AA · H+ … ON(O)O … H+ · AA units. For comparision with the above complex the structure of [AA · H+]Picr- (Picr- = picrate anion) is also reported.
    Notes: Die elektrochemische Disproportionierung Cu2+ + Cu0 → Cu1+ im System CuCl2—Allylamin(AA)—HNO3—Ethanol ergibt den π-Komplex [Cu2Cl2(AA · H+)2](NO3)2, dessen Kristallstruktur röntgenographisch bestimmt wurde. Die Verbindung kristallisiert im monoklinen Kristallsystem, Raumgruppe P21/a, a = 7,229(3), b = 7,824(3), c = 26,098(6) Å, γ = 94,46(5)°, Z = 4, R = 0,025 für 2 023 Reflexe. Die Kristallstruktur besteht aus CunCln-Ketten, die durch π-bindende, zweizähnige AA · H+ … ON(O)O · H+ · AA-Einheiten verknüpft sind. Zum Vergleich wird auch über die Struktur von [AA · H+]Pikr- (Pikr- = Pikratanion) berichtet.
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  • 52
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1813-1817 
    ISSN: 0044-2313
    Keywords: [AsPh4][Ph2P(S)NSiMe3] · 0.5 THF ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Darstellung und Röntgen-Strukturbestimmung von [AsPh4][Ph2P(S)NSiMe3] · 0,5 THFDie Reaktion von Ph2P(S)N(SiMe3)2 mit Kalium-tert-butoxid im molaren Verhältnis 1:1 ergibt K[Ph2P(S)NSiMe3], das mit [AsPh4]Cl zum AsPh4+-Salz umgesetzt wird. Die Kristallstruktur von [AsPh4][Ph2P(S)NSiMe3] ·0,5 THF besteht aus AsPh4+ und Ph2P(S)NSiMe3- mit d(P—S) = 1,980(4) Å und d(P—N) = 1,555(8) Å. Der P—N—Si-Winkel im Anion beträgt 136,3(5)°. Der elektrophile Angriff von Ph2P(S)Cl erfolgt am Schwefel des Ph2P(S)NSiMe3-. Die Oxidation des Anions mit Iod ergibt ein Disulfid, das bei Umsetzung mit Kalium-tert-butoxid wieder K[Ph2P(S)NSiMe2] ergibt.
    Notes: The reaction of Ph2P(S)N(SiMe3)2 with potassium tert-butoxide in a 1:1 molar ratio produces K[Ph2P(S)NSiMe3], which was converted to the AsPh4+ salt by metathesis with [AsPh4]Cl. The X-ray crystal structure of [AsPh4][Ph2P(S)NSiMe3] · 0.5 THF consists of noninteracting AsPh4+ and Ph2P(S)NSiMe3- ions with d(P—S) = 1.980(4) Å and d(P—N) = 1.555(8) Å. The PNSi bite angle in the anion is 136.3(5)°. Electrophilic attack by Ph2P(S)Cl occurs at the sulfur atom of Ph2P(S)NSiMe3-. The oxidation of the anion with iodine produces a disulfide which regenerates K[Ph2P(S)NSiMe2] upon treatment with potassium tert-butoxide.
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  • 53
    ISSN: 0044-2313
    Keywords: Polyoxovanadates ; alkoxy hexavanadates ; bis-(trisalkoxy)-hexavanadates: UV/VIS ; IR ; ESR ; magnetic measurements ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cis-/Trans-Isomerism of Bis-(trisalkoxy)-hexavanadates: cis-Na2[V6IVO7(OH)6{(OCH2)3CCH2OH}2] · 8 H2O, cis-(CN3H6)3[VIVV5VO13{(OCH2)3CCH2OH}2] · 4.5 H2O and trans-(CN3H6)2[V6VO13{(OCH2)3CCH2OH}2] · H2OPolyoxovanadates with distorted Lindquist-structure, in which six of the twelve μ2-oxygen atoms are formally replaced by the oxygen atoms of two coordinated pentaerythritol ligands, can be prepared by a simple method in an aqueous medium. The “fully reduced”, six-fold protonated compound cis-Na2[V6VO7(OH)6{(OCH2)3CCH2OH}2] · 8 H2O (1), the mixed valence species cis-(CN3H6)3[VIVV5VO13{(OCH2)3CCH2OH}2] · 4.5 H2O (2) containing one localized VIV centre and the “fully oxidized” compound trans-(CN3H6)2[V6VO13{(OCH2)3CCH2 · OH}2] · H2O (3) have been synthesized and characterized by UV/VIS-, IR- and EPR-spectroscopy, by magnetic measurements, cyclic voltammetry and by a single-crystal X-ray structure analysis.The organic {(CH2)3CCH2OH}3+-groups tend to cap the triangular faces formed by μ2-oxygen atoms of the central approximately octahedral {V6O19}-unit. Therefore the anions of bis-(trisalkoxy)-hexavanadates can exist in a trans-form as well as in an isomeric cis-form referring to a “basic” plane of four vanadium atoms of the {V6}-octahedron. The different relative positions of the ligands have a significant influence on the redox potentials of the compounds.For structural details see “Inhaltsübersicht”.
    Notes: Die beschriebenen Trisalkoxy-polyoxovanadate mit verzerrter Lindqvist-Struktur, in der sechs der zwölf μ2-verbrückenden Sauerstoffatome formal durch die Sauerstoffatome von zwei koordinierten Pentaerythritolliganden ((HOCH2)3CCH2OH) ersetzt wurden, können auf einfache Weise im wäßrigen Medium dargestellt werden. Durch UV/VIS-, IR- und ESR-Spektroskopie sowie durch magnetische Messungen, Cyclovoltammetrie und Röntgenstrukturanalyse wurden die „vollständig reduzierte“, sechsfach protonierte Verbindung cis-Na2[V6IVO7(OH)6{(OCH2)3CCH2OH}2] ·8 H2O (1), das gemischtvalente, ein lokalisiertes V(IV)-Zentrum enthaltende Derivat cis-(CN3H6)3[VIVV5VO13{(OCH2)3CCH2OH}2] · 4,5 H2O (2) sowie die „vollständig oxidierte“ Verbindung trans-(CN3H6)2[V6VO13{(OCH2)3CCH2OH}2] · H2O (3) charakterisiert.Da die organischen {(CH2)3CCH2OH}3+-Gruppen, formal betrachtet, die jeweils aus drei μ2-O-Atomen gebildeten Flächen der zentralen, angenähert oktaedrischen {V6O19}-Einheit überdachen, können die Anionen der Bis-(trisalkoxy)-hexavandate sowohl in einer trans-Form als auch in einer stellungsisomeren cis-Form bezüglich einer aus vier Vanadiumatomen des {V6}-Oktaeders gebildeten „Basis“-Ebene auftreten. Die unterschiedliche Anordnung der Liganden hat einen signifikanten Einfluß auf die Redoxpotentiale der Verbindungen.1: cis-Na2[VI6VO7(OH)6{(OCH2)3CCH2OH}2] · 8 H2O: Raumgruppe P1, a = 987,2(2) pm, b = 1 080,6(2) pm, c = 1 654,3(3) pm, α = 94,83(1)°, β = 98,73(2)°, γ = 116,05(1)°, V = 1,5443(5) nm3, Z = 2, R = 0,067 für 5 913 unabhängige Reflexe [F 〉 4σ(F)].2: cis-(CN3H6)3[VIVV5VO13{(OCH2)3CCH2OH}2] · 4,5 H2O: Raumgruppe Pbca, a = 1 569,5(3) pm, b = 1 652,3(3) pm, c = 2 758,2(6) pm, V = 7,153(2) nm3, Z = 8, R = 0,126 für 2 698 unabhängige Reflexe [F 〉 4σ(F)].3: trans-(CN3H6)2[V6VO13{(OCH2)3CCH2OH}2] · H2O: Raumgruppe C2/c, a = 2 293,4(3) pm, b = 1 102,6(2) pm, c = 1 368,6(2) pm, β = 120,87(1)°, V = 2,9705(8) nm3, Z = 4, R = 0,046 für 2 206 unabhängige Reflexe [F 〉 4σ(F)].
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  • 54
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    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1875-1882 
    ISSN: 0044-2313
    Keywords: Bis(acetato)dimethyltin(IV) ; bis(trifluoroacetato)dimethyltin(IV) ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Strukturuntersuchungen an Dimethylzinn(IV)-carboxylatenUm die 119Sn-Mössbauer-Parameter und Strukturdaten für Dimethylzinn(IV)-Derivate zu korrelieren, wurden die Molekülstrukturen von Bis(acetato)dimethylzinn(IV) und Bis(trifluoroacetato)dimethylzinn(IV) durch Einkristall-Röntgen-Strukturanalysen bestimmt. Me2Sn(OOCCH3)2: monoklin, a = 26,282(4), b = 5,282(1), c = 14,434(3) Å, β = 101,17(2)°, Z = 8, Raumgruppe C2/c; [Me2Sn(OOCCF3)2]n: monoklin, a = 8,444(1), b = 17,689(1), c = 15,368(1) Å, β = 93,013(9)°, Z = 8, Raumgruppe Cc. Die Strukturen wurden mit Patterson-Methoden gelöst und verfeinert nach dem full-matrix least-squares-Verfahren bis zu R = 0,025 bzw. 0,027 (Rw = 0,023 and 0,030) für 2 298 bzw. 4 182 Reflexe mit I ≥ 3σ(F2).
    Notes: In order to correlate 119Sn Mössbauer parameters and structural data for dimethyltin(IV) derivatives, the molecular structures of bis(acetato)dimethyltin(IV) and bis(trifluoroacetato)dimethyltin(IV) were determined by single crystal X-ray diffration. Crystals of Me2Sn(OOCCH3)2 are monoclinic, a = 26.282(4), b = 5.282(1), c = 14.434(3) Å, β = 101.17(2)°, Z = 8, space group C2/c, and those of [Me2Sn(OOCCF3)2]n are monoclinic, a = 8.444(1), b = 17.689(1), c = 15.368(1) Å, β = 93.013(9)°, Z = 8, space group Cc. The structures were solved by the Patterson method and were refined by full-matrix least-squares procedures to R = 0.025 and 0.027 (Rw = 0.023 and 0.030) for 2 298 and 4 182 reflections with I ≥ 3σ(F2), respectively.
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  • 55
    ISSN: 0044-2313
    Keywords: Phosphorus sulfides ; 31P NMR spectroscopy ; phosphorus sulfur melts ; tetra phosphorus hexasulfide ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Molecular Composition of Solidified Phosphorus-Sulfur Melts and the Crystal Structure of β-P4S6Phosphorus sulfur melts were annealed for one week at 673 K and then quenched in ice water. The solids were dissolved in CS2 and the concentrations of phosphorus sulfides were determined by 31P NMR spectroscopy. Samples containing between 44 and 70 mol% sulfur dissolved completely in CS2. Between 0 and 42 mol% remains an insoluble residue of red phosphorus. Above 72 mol% it consisted of sulfur chains linked by phosphorus atoms. The solutions contained mainly the congruently melting compounds P4S3, P4S7, and P4S10 having maximum concentrations at their stoichiometric compositions. Other compounds P4Sn (n = 4-9) which decompose on heating, according to the phase diagram, were also found in surprisingly high concentrations. One of these was β-P4S6 which crystallizes in the monoclinic space group P21/c with the lattice parameters a = 702.4(2), b = 1 205.6(2), c = 1 148.9(6) pm and β = 103.4(2)°.Reaction of white phosphorus with sulfur was also investigated. In contrast to the results of previous authors, who described the system P4-S8 below 373 K as eutectic, we found that the elements reacted below this temperature.
    Notes: Phosphor-Schwefel-Schmelzen wurden eine Woche bei 673 K getempert und anschließend in Eiswasser abgeschreckt, dann in CS2 gelöst und die Konzentration der Phosphorsulfide mit Hilfe der 31P-NMR-Spektroskopie bestimmt. Proben mit Zusammensetzungen zwischen 44 und 70 Mol-% Schwefel lösten sich vollständig auf. Zwischen 0 und 42 Mol-% Schwefel traten als unlöslicher Rückstand roter Phosphor, oberhalb von 72 Mol-% Schwefel über Phosphoratome vernetzte Schwefelketten auf. Die löslichen Bestandteile waren hauptsächlich die kongruent schmelzenden Verbindungen P4S3, P4S7 und P4S10. Die maximalen Konzentrationen lagen bei den jeweiligen stöchiometrischen Zusammensetzungen. Andere P4Sn (n = 4-9) Verbindungen, deren Molekülkristalle sich beim Erwärmen peritektisch oder peritektoid zersetzen, wurden ebenfalls mit höheren Konzentrationen gefunden, dazu gehörte β-P4S6, das in der monoklinen Raumgruppe P21/c mit den Gitterkonstanten a = 702,4(2), b = 1 205,6(2), c = 1 148,9(6) pm und β = 103,4(2)° kristallisiert.Die Reaktion von weißem Phosphor mit Schwefel wurde ebenfalls untersucht. Im Gegensatz zu Angaben anderer Autoren, die das P4-S8-System unterhalb von 373 K als einfach eutektisch beschreiben, wurden in diesem Temperaturbereich Reaktionen zwischen den Komponenten beobachtet.
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  • 56
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    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 2061-2064 
    ISSN: 0044-2313
    Keywords: Chromium(II) chloride TMEDA complex ; crystal structure ; magnetism ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Structure, and Magnetic Properties of [CrCl(-μCl)(TMEDA)]2The title complex [CrCl(μ-Cl)(TMEDA)]2 (1) is obtained in an equimolar reaction of CrCl2(THF) with TMEDA in high yield. 1 crystallises in the monoclinic space group P21/c with a = 843.2(2), b = 1 109.(2), c = 1 147.4(3) pm, β = 102.99(2)° and Z = 2. The molecular structure of 1 contains two, slightly distorted quadratic pyramidal CrL5-subunits, which are linked via two unsymmetrical Cl-bridges. The μ-Cl-functions take the apical position of one and a basal position of the second CrL5-unit, wherein the apical Cr-Cl bond (277.6(1) pm) is destinctly longer than the basal Cr-Cl bond (240.6(1) pm). The terminal Cr-Cl bond is still shorter (237.5(1) pm). The Cr…Cr distance is far beyond any bonding interaction. This is confirmed by means of magnetic susceptibility measurements, which show four unpaired electrons per Cr centre; however, a small antiferromagnetic coupling of J/k = -7.3 K can be calculated. This coupling is suggested to be originated by a 90°-σ-superexchange via the asymmetric μ-Cl functions.
    Notes: Den Titelkomplex [CrCl(μ-Cl)TMEDA]2 (1) erhält man in einer äquimolaren Reaktion von CrCl2(THF) mit TMEDA in hohen Ausbeuten. 1 kristallisiert in der monoklinen Raumgruppe P21/c mit a = 843,2(2), b = 1 109,4(2), c = 1 147,4(3) pm, β = 102.99(2)° und Z = 2. Die Molekülstruktur von 1 enthält zwei leicht verzerrte quadratisch pyramidal koordinierte CrL5-Untereinheiten, die über zwei unsymmetrische Cl-Brücken verbunden sind. Die μ-Cl-Funktionen nehmen die apikale Position der einen und eine basale Position der anderen CrL5-Einheit ein, wobei die apikale Cr-Cl-Bindung (277,6(1) pm) deutlich länger als die basale Cr-Cl-Bindung (240,6(1) pm) ist. Die terminale Cr-Cl-Bindung ist noch kürzer (237,5(1) pm), Der Cr—Cr-Abstand mit 381,7(1) pm liegt deutlich außerhalb einer bindenden Cr-Cr-Wechselwirkung. Dieses wird durch magnetische Suszeptibilitätsmessungen bestätigt, die pro Cr-Zentrum vier ungepaarte Elektronen nachweisen; allerdings kann eine kleine antiferromagnetische Kopplung von J/k = -7,3 K berechnet werden. Diese Kopplung wird vermutlich durch einen 90°-σ-Superaustausch über die Cl-Brücken erwirkt.
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  • 57
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    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 2070-2074 
    ISSN: 0044-2313
    Keywords: Antimony(III) thiocyanate complex ; crystal structure ; IR spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Darstellung, Kristallstruktur und IR-Charakterisierung des ersten Thiocyanato-oxyantimonats(III), [(CH3)4N]2[Sb6O4(NCS)12][(CH3)4N]2[Sb6O4(NCS)12] ist der erste Thiocyanato-oxyantimonat(III)-Komplex. Die Synthese, wichtige IR-Daten und die Struktur werden mitgeteilt. Die Verbindung kristallisiert in der triklinen Raumgruppe P1, Z = 2 (C10H12N7O2S6Sb3), a = 11,314(6), b = 12,846(3), c = 8,679(2) Å, α = 91,93(3)°, β = 90,31(3)°, γ = 99,13(3)°. Die Struktur wird aus zentrosymmetrischen [Sb6O4(NCS)12]2--Anionen und isolierten Tetramethylammonium-Kationen aufgebaut. Das grundlegende Strukturelement des Anions wird von drei SbOSbO-Ringen gebildet, die zu einem in zick-zack-Form, leicht gefalteten Band verbunden sind. Etwas Besonderes ist die Ungleichheit der sechs Thiocyanat-Liganden, obwohl alle N-gebunden an Antimon sind. Drei Thiocyanate sind terminal, während drei andere asymmetrisch N-verbrückend zwischen zwei Zentren sind; zwei von diesen verbinden die Anionen über Sb⋅⋅⋅S-Kontakte. Für die Antimonatome sind drei unterschiedliche Umgebungen vorhanden, einmal die Bindung an einen Stickstoff und drei Sauerstoffe, zweitens an einen Sauerstoff und drei Stickstoffe und drittens an je zwei Sauerstoffe und Stickstoffe.
    Notes: The salt [(CH3)4N]2[Sb6O4(NCS)12] is the first identified thiocyanato-oxy-antimonate(III) complex. Reported are details of the synthesis, relevant infrared data and its x-ray structure. The compound crystallizes in the triclinic space group P1 with Z = 2 (C10H12N7O2S6Sb3) and unit cell dimensions a = 11.314(6), b = 12.846(3), c = 8.679(2) Å; α = 91.93(3)°, β = 90.31(3)° and γ = 99.13(3)°. It contains centrosymmetric [Sb6O4(NCS)12]2- anions packed with isolated tetramethyl-ammonium cations. The fundamental structural element of the anion is provided by the fusion of three SbOSbO rings forming a zig-zag portion of a ribbon, only slightly pleated. Peculiar is the unequivalence of the six thiocyanate ligands, though all primarily N-bonded to antimony atoms. Three thiocyanates are terminal while other three are asymmetrically N-bridging between two centers; two of this latter type are also interconnecting the anions via Sb⋅⋅⋅S contacts. There are three different antimony environments, the primary bonding at Sb being to one nitrogen and three oxygens, to one oxygen and three nitrogens and to two atoms of each type.
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  • 58
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    Zeitschrift für anorganische Chemie 621 (1995), S. 2083-2088 
    ISSN: 0044-2313
    Keywords: Transition metal chalcogenides ; platinum ; palladium ; melting reaction ; crystal structure ; Extended-Hückel-calculations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ternary Thallium Platinum and Thallium Palladium Chalcogenides Tl2M4X6. Syntheses, Crystal Structures, and Bonding RelationsThe compounds Tl2Pt4S6, Tl2Pt4Se6, Tl2Pt4Te6 and Tl2Pd4Se6 can be synthesized by a melting reaction from the elements or by the reaction of thallium carbonate, transition metal powder and chalcogen powder in the temperature range between 400°C and 950°C. X-Ray investigations on single crystals and powdered samples revealed a new structure type for the compounds, that can be understood as stacking variant of the already known atom arrangement of the alkaline metal platinum chalkogenides A2Pt4X6 (A ≙ alkaline metal, X ≙ S, Se). The short distances thallium-platinum and thallium-palladium, respectively, as well as the results of Extended-Hückel-calculations indicate covalent bonds between the main group and transition metal atoms.
    Notes: Die Verbindungen Tl2Pt4S6, Tl2Pt4Se6, Tl2Pt4Te6 und Tl2Pd4Se6 sind durch Schmelzreaktionen aus den jeweiligen Elementen oder durch die Umsetzung von Thalliumcarbonat, Übergangsmetall- und Chalkogenpulver im Temperaturbereich zwischen 400°C und 950°C darstellbar. Röntgenographische Untersuchungen an Einkristallen und an pulverförmigen Proben ergaben, daß die Verbindungen in einem neuen Strukturtyp kristallisieren, der als Stapelvariante schon bekannter Atomanordnungen der Alkalimetallplatinchalkogenide A2Pt4X6 (A ≙ Alkalimetall, X ≙ S, Se) aufgefaßt werden kann. Die geringen Atomabstände Thallium-Platin bzw. Thallium-Palladium deuten in übereinstimmung mit den Ergebnissen von Extended-Hückel-Rechnungen auf eine kovalente Bindung zwischen dem Hauptgruppen- und dem übergangsmetall hin.
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  • 59
    ISSN: 0044-2313
    Keywords: Monomeric trilithium-tris(silylamido)silane ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Monomeric Trilithium-tris[tert-butyldimethylsilylamido]phenylsilane, PhSi[NLi(thf)SiMe2CMe3]3 - Synthesis and Crystal StructureLithiated tert-butyldimethylsilylamine reacts with trifluorophenylsilane in a molar ratio 2:1 or 3:1 to give the bis- and tris(silylamino)silanes 1 [(Me3CSiMe2NH)2SiFPh] and 2 [(Me3CSiMe2NH)3SiPh]. The trilithium derivative 3 [Me3CSiMe2NLi(thf)]3SiPh is obtained in the reaction of 2 with n-BuLi in hexane/thf. 3 crystallizes as a monomer forming three planar four-membered (LiNSiN)-rings. The results of the crystal structure of 3 are discussed.
    Notes: Lithiiertes tert-Butyldimethylsilylamin reagiert mit Trifluorphenylsilan im molaren Verhältnis 2:1 bzw. 3:1 zu den Bis- und Tris(silylamino)silanen 1 [(Me3CSiMe2NH)2 · SiFPh] und 2 [(Me3CSiMe2NH)3SiPh]. In der Reaktion von 2 mit n-BuLi in Hexan/THF entsteht das Trilithiumderivat 3 [Me3CSiMe2NLi(THF)]3SiPh. 3 kristallisiert als Monomer und bildet im Kristall drei planare, viergliedrige (LiNSiN)-Ringe. Die Ergebnisse der Kristallstrukturanalyse von 3 werden mitgeteilt.
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  • 60
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    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1977-1979 
    ISSN: 0044-2313
    Keywords: Samarium sesquiselenide ; chemical transport ; crystal structure ; polymorphism ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Polymorphism of Sm2Se3Two modifications of Sm2Se3 could be obtained in form of single crystals by chemical transport reaction. We prepared starting from Sm2Se3 powders red brown crystals of Sm2Se3 in the defective Th3P4 type structure with the space group I43d and a = 878.2 pm as well as starting from SmSe1.9 and samarium metal black, prismatic crystals of Sm2Se3 in the U2S3 type structure with the space group Pnma and a = 1 127.3 pm, b = 409.1 pm and c = 1103.2 pm.
    Notes: Zwei Modifikationen von Sm2Se3 konnten durch chemischen Transport in Form von Einkristallen erhalten werden. Es wurden einmal ausgehend von pulverförmigem Sm2Se3 rotbraune, plättchenförmige Einkristalle von Sm2Se3 im defekten Th3P4-Strukturtyp mit der Raumgruppe I43d und a = 878,2 pm dargestellt, zum anderen ausgehend von SmSe1,9 und Samariummetall schwarze, prismenförmige Einkristalle von Sm2Se3 im U2S3-Strukturtyp mit der Raumgruppe Pnma und a = 1 127,3 pm, b = 409,1 pm und c = 1 103,2 pm.
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  • 61
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    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 409-411 
    ISSN: 0044-2313
    Keywords: Alkali metal cobalt chalcogenides, Na6CoS4, Na6CoSe4, K6CoS4 ; preparation ; crystal structure ; magnetic properties ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Magnetic Properties of the Cobaltates Na6CoS4, Na6CoSe4, and K6CoS4The alkali metal cobalt chalcogenides Na6CoS4, Na6CoSe4, and K6CoS4 crystallize in the space group P63mc with Z = 4. The structure is characterized by isolated [CoX4]-tetrahedra.The magnetic susceptibilities show Curie-Weiss behaviour. The deviations at low temperatures are caused by antiferromagnetic interactions. The magnetic moments are discussed with regard to ligand-field parameters.
    Notes: Die Alkalicobaltchalkogenide Na6CoS4, Na6CoSe4 und K6CoS4 kristallisieren in der Raumgruppe P63mc mit Z = 4. Als charakteristische Baugruppen treten „isolierte“ tetraedrische [CoX4]-Einheiten auf.Die Temperaturabhängigkeiten der magnetischen Suszeptibilitäten lassen sich mit einem Curie-Weiss-Verhalten beschreiben. Bei tiefen Temperaturen treten Abweichungen von diesem Verhalten auf, die auf antiferromagnetische Wechselwirkungen zurückzuführen sind. Die magnetischen Momente werden im Hinblick auf Ligandenfeldparameter diskutiert.
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  • 62
    ISSN: 0044-2313
    Keywords: Ternary cobalt sulphides ; preparation ; crystal structure ; magnetic properties ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A New Type of Ternary Cobalt Sulphide, A9Co2S7 (A \documentclass{article}\pagestyle{empty}\begin{document}$ \buildrel \wedge \over = $\end{document} K, Rb or Cs), containing Trigonal-Planar [CoS3] Units of Two- and Three-Valent CobaltThe passage of a stream of hydrogen over an alkali carbonate/cobalt/sulphur melt resulted in the preparation of the compounds K9Co2S7, Rb9Co2S7 and Cs9Co2S7. The structure of the potassium compound (Space group P213, Z = 4) could be determined from X-ray diffraction experiments on single crystals whilst X-ray investigations of powdered samples of the rubidium and caesium compounds indicate isotypic atomic arrangements with K9Co2S7. The characteristic structural elements of these compounds are trigonal-planar [CoS3]-units of two- and three-valent cobalt. The results from investigations of the magnetic properties of these ternary cobalt sulphides are in agreement with those expected for mixed-valent CoII/CoIII structures. The analogously-composed ferrates are closely structurally-related to these sulphides and show corresponding magnetic properties [1].
    Notes: Durch Schmelzreaktionen von Alkalicarbonat mit Cobalt und Schwefel im Wasserstoffstrom gelang die Darstellung der Verbindungen K9Co2S7, Rb9Co2S7 und Cs9Co2S7. Die Struktur der Kaliumverbindung konnte über röntgenographische Untersuchungen an Einkristallen bestimmt werden (Raumgruppe P213, Z = 4). Untersuchungen an pulverförmigen Proben lassen für die Rubidium- und die Cäsiumverbindung isotype Atomanordnungen erkennen. Als charakteristische Strukturelemente treten trigonal planare [CoS3]-Baugruppen des zwei- und dreiwertigen Cobalts auf. Untersuchungen zum Magnetismus sind in Übereinstimmung mit der Annahme eines gemischtvalenten Aufbaus, der auch bei den analog zusammengesetzten, in einem eng verwandten Strukturtyp kristallisierenden Ferraten auftritt [1].
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  • 63
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    Zeitschrift für anorganische Chemie 621 (1995), S. 424-430 
    ISSN: 0044-2313
    Keywords: Thioborates ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: LiBaBS3 and LiBaB3S6: Two New Quaternary Thioborates with Trigonally Coordinated BoronLiBaBS3 (P21/c; a = 7.577(2) Å, b = 8.713(2) Å, c = 8.687(2) Å, β = 116.22(2)°; Z = 4) und LiBaB3S6 (Cc; a = 15.116(3) Å, b = 8.824(2) Å, c = 8.179(2) Å, β = 117.46(3)°; Z = 4) were prepared by reaction of stoichiometric amounts of the metal sulfides, boron, and sulfur at 750°C. The anionic part of the structure of the orthothioborate LiBaBS3 consists of isolated planar [BS3]3- anions. The crystal structure of the metathioborate LiBaB3S6 contains [B3S6]3- anions formed by six-membered B3S3 rings with three exocyclic sulfur atoms. The metal cations are situated between the anion units leading to a ninefold sulfur coordination of the barium atoms and to a fivefold (LiBaBS3) and fourfold (LiBaB3S6) coordination of the lithium atoms.
    Notes: LiBaBS3 (P21/c; a = 7,577(2) Å, b = 8,713(2) Å, c = 8,687(2) Å, β = 116,22(2)°; Z = 4) und LiBaB3S6 (Cc; a = 15,116(3) Å, b = 8,824(2) Å, c = 8,179(2) Å, β = 117,46(3)°; Z = 4) wurden durch Reaktion stöchiometrischer Mengen der Metallsulfide mit Bor und Schwefel bei 750°C dargestellt. Die Anionenteilstruktur des Orthothioborats LiBaBS3 besteht aus isolierten, planaren [BS3]3--Anionen. Die Kristallstruktur des Metathioborats LiBaB3S6 enthält [B3S6]3--Anionen aus B3S3-Sechsringen mit drei exocyclischen Schwefelatomen. Die Metallkationen befinden sich jeweils zwischen den Anioneneinheiten, wobei für Barium eine neunfache, für Lithium eine fünffache (LiBaBS3) bzw. vierfache (LiBaB3S6) Koordination durch Schwefel beobachtet wird.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 484-487 
    ISSN: 0044-2313
    Keywords: Lithiummetaperiodate ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structure of Lithiummetaperiodate, LiIO4For the first time single crystals of LiIO4 were obtained. According to the results of an X-ray structure determination (monoclinic, P21/n; a = 525.5(3), b = 851.1(4), c = 796.9(5) pm, β = 104.21(3)°; Z = 4; 2 148 diffractometer data, R = 0.024) the coordination by oxygen is tetrahedral for iodine and strongly distorted trigonal bipyramidal for lithium. Two lithium-oxygen-polyhedra are connected via a common edge. LiIO4 crystallises isostructural to LiAlH4. The structure is discussed and compared to those of other metaperiodates and tetrahydridoaluminates.
    Notes: Erstmals wurden Einkristalle von LiIO4 erhalten. Nach der Röntgenstrukturanalyse (monoklin, P21/n; a = 525,5(3), b = 851,1(4), c = 796,9(5) pm, β = 104,21(3)°; Z = 4; 2 148 unabhängige Reflexe, R = 0,024) wird Iod tetraedrisch und Lithium stark verzerrt trigonal-bipyramidal von Sauerstoff koordiniert. Dabei sind jeweils zwei Lithium-Sauerstoff-Polyeder miteinander kantenverknüpft. Es besteht Isotypie zu LiAlH4. Die Struktur wird diskutiert und mit denen anderer Metaperiodate und Tetrahydridoaluminate verglichen.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 737-739 
    ISSN: 0044-2313
    Keywords: Ammonium sodium indium fluoride ; crystal growth ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Single Crystal Structure of (NH4)2NaInF6(NH4)2NaInF6 has been synthesized via a novel route from In2O3, NaF and NH4F and its crystal structure has been determined using single crystal techniques (Fm3m, a = 8.6675(3) Å, Z = 4, 4 106 reflections, R = 0.007). The crystal structure derives from the elpasolite type of structure, the ammonium ions are not disordered.
    Notes: (NH4)2NaInF6 wurde auf einem neuen Wege aus In2O3, NaF und NH4F hergestellt und die Kristallstruktur aufgeklärt (Fm3m, a = 8,6675(3) Å, Z = 4, 4 106 Reflexe, R = 0,007). Es liegt eine Elpasolith-Variante vor, die Ammoniumionen sind geordnet.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 740-742 
    ISSN: 0044-2313
    Keywords: Ternary halides ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of the Ternary Rare Earth Chlorides Na2MCl5 (M = Sm, Eu, Gd)Single crystals of Na2EuCl5 were obtained from the melt of NaCl and EuCl3 in a 2:1.2 molar ratio by slow cooling. It crystallizes in the orthorhombic crystal system (space group Pnma) with the structure of K2PrCl5 with a = 1 204.0(3) pm, b = 833.9(3) pm, c = 768.2(3) pm, Z = 4. Pure powder samples of the compounds Na2MCl5 (M = Sm—Gd) are available by heating mixtures of the binary components below the melting point.
    Notes: Einkristalle von Na2EuCl5 erhält man durch langsames Abkühlen einer Schmelze von EuCl3 und NaCl (molares Verhältnis 1,2:2). Na2EuCl5 kristallisiert orthorhombisch (Raumgruppe Pnma) im K2PrCl5-Typ mit a = 1 204,0(3) pm, b = 833,9(3) pm, c = 768,2(3) pm, Z = 4. Pulverproben der Verbindungen Na2MCl5 (M = Sm—Gd) gewinnt man durch Tempern von Gemengen der binären Komponenten.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 871-876 
    ISSN: 0044-2313
    Keywords: 1,3,5-trimethyl-tetrahydro-1,3,5-triazinium-iodide ; 1,3,5-trimethyl-tetrahydro-1,3,5-triazinium-triiodide ; 1,3,5-trimethyl-tetrahydro-1,3,5-triazinium-pentaiodide ; iodine, polyiodide ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Formation of cyclic Amidiniumiodides and -polyiodides from 1,3,5-Trimethyl-hexahydro-1,3,5-triazine and IodineThe reaction of 1,3,5-trimethyl-hexahydro-1,3,5-triazine (CH3NCH2)3 with iodine in the molar ratio (CH3NCH2)3:I2 = 2:1 gives the new compound 1,3,5-trimethyl-tetrahydro-1,3,5-triazinium-iodide C6H14N3I. This iodide adds one mole I2 and forms 1,3,5-trimethyl-tetrahydro-1,3,5-triazinium-triiodide C6H14N3I3. The crystal structure analysis shows a cation, in which two methyl groups and five ring atoms are planar arranged. The third methyl group stands axial to the ring. 1,3,5-Trimethyl-tetrahydro-1,3,5-triazinium-pentaiodide is formed by adding a further mole I2.
    Notes: Die Umsetzung von 1,3,5-Trimethyl-hexahydro-1,3,5-triazin (CH3NCH2)3 mit Iod im Molverhältnis (CH3NCH2)3: I2 = 2:1 ergibt die bislang unbekannte Verbindung 1,3,5-Trimethyl-tetrahydro-1,3,5-triazinium-iodid C6H14N3I. Diese Verbindung lagert ein Mol I2 an und bildet 1,3,5-Trimethyl-tetrahydro-1,3,5-triazinium-triiodid C6H14N3I3. Die Kristallstrukturanalyse zeigt ein Kation, in dem zwei Alkylgruppen gemeinsam mit fünf Ringatomen planar angeordnet sind. Die dritte Alkylgruppe steht axial zum Ring. 1,3,5-Trimethyl-tetrahydro-1,3,5-triazinium-triiodid addiert ein weiteres Äquivalent I2 unter Bildung des entsprechenden Pentaiodids.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 889-893 
    ISSN: 0044-2313
    Keywords: Ga—P-Heterocubane ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: {(MesGa)3[GaP(H)Mes](PMes)4}, a Phosphorus-substituted Ga—P-HeterocubaneA mixture of MesGaCl2/GaCl3 (ratio 3:1) reacts with 5 equivalents of MesPLi2 in THF at -78°C to the title compound {(MesGa)3[GaP(H)Mes](PMes)4} (1) by use of the “dilution principle”. 1 can be obtained in 30% yield. Recrystallization of 1 from DME and toluene, respectively, gives 1 · 0.5 DME and 1 · toluene. 1 was characterized by NMR-, IR-, and MS-techniques. According to the X-ray structure determination of 1 · toluene, 1 has a heterocubane structure, one corner of which is substituted with an P(H)Mes group.
    Notes: Eine Mischung von MesGaCl2/GaCl3 (molares Verhältnis 3:1) reagiert mit fünf Äquivalenten MesPLi2 in THF bei -78°C zur Titelverbindung {(MesGa)3[GaP(H)Mes] · (PMes)4} (1) unter Anwendung des „Verdünnungsprinzipes“. 1 kann in 30% Ausbeute isoliert werden. Wird 1 aus DME oder Toluol umkristallisiert, werden 1 · 0,5 DME bzw. 1 · Toluol in Form von farblosen Kristallen erhalten. 1 wurde durch NMR-, IR- und MS-Untersuchungen charakterisiert. Nach den Ergebnissen der Röntgenstrukturanalysen von 1 · Toluol hat 1 eine Heterocuban-Struktur, wobei eine Ecke mit einer P(H)Mes-Gruppe substituiert ist.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 921-924 
    ISSN: 0044-2313
    Keywords: Niobium cluster azide ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: An Octahedral Niobium Cluster containing Six Terminal Azide Groups: The Structure of Rb4[Nb6Br12(N3)6](H2O)2Six terminal halide ligands of [Nb6Br12Br6]4- can be substituted in solution by azide ions. Single-crystals of Rb4[Nb6Br12(N3)6](H2O)2 were obtained during the evaporation of the water/methanol solvent, and structurally characterized by X-ray methods: Space group P21/c, Z = 2, a = 970.8(5) pm, b = 1525.4(7) pm, c = 1280.0(7) pm, β = 97.15(6)°. The [Nb6Br12(N3)6]4- ions contain six terminal azide groups at the corners of the octahedral niobium cluster (dNb-N = 227 pm). The [Nb6Br12(N3)6]4- ions are interconnected by Rb+ and H2O. Crystals of Rb4[Nb6Br12(N3)6](H2O)2 are explosive towards heat or mechanic pressure.
    Notes: Sechs terminal gebundene Halogenliganden von [Nb6Br12Br6]4- können in Lösung durch Azidionen ausgetauscht werden. Einkristalle von Rb4[Nb6Br12(N3)6](H2O)2 bildeten sich beim Eindunsten einer wäßrig-methanolischen Lösung und wurden röntgenographisch charakterisiert: Raumgruppe P21/c, Z = 2, a = 970,8(5) pm, b = 1525,4(7) pm, c = 1280,0(7) pm, β = 97,15(6)°. Die Struktur enthält [Nb6Br12(N3)6]4--Ionen in denen sechs terminale Azidgruppen an den Ecken des oktaedrischen Niobclusters (dNb-N = 227 pm) gebunden sind. In der Kristallstruktur liegen die [Nb6Br12(N3)6]4--Ionen verbrückt über Rb+ und H2O vor. Kristalle von Rb4[Nb6Br12(N3)6](H2O)2 reagieren auf Hitze oder mechanischen Druck explosiv.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 925-930 
    ISSN: 0044-2313
    Keywords: Ternary nickelphosphide ; barium ; crystal structure ; dimorphism ; band structure calculations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: BaNi2P4: Dimorphism by Peierls Instability?BaNi2P4 was prepared by heating a mixture of the elements and investigated by means of single crystal X-ray methods. At T ≥ 100°C the compound crystallizes in the tetragonal BaPd2P4-type structure (α phase: 14/mmm, a = 6.553(1) Å, c = 5.769(1) Å; Z = 2). Chains of edge-shared NiP4 tetrahedra are orientated to each other, so that the P atoms form P4 rings (P—P distance: 2.23 Å). These are connected with the Ni atoms to Ni8P16 cages in the form of compressed truncated octahedra with Ba atoms in the centres. Below 100°C α-BaNi2P4 gradually undergoes a phase transition and forms an orthorhombic variant of the structure (β-phase; Immm; a = 6.620(1) Å, b = 6.470(1) Å, c = 5.785(1) Å; Z = 2). In the course of this the Ni—Ni distances of α-BaNi2P4 alternately split up into shorter and longer ones. Extended Hückel calculations show, that the structure of β-BaNi2P4 is stabilized by a Peierls distortion of the chains of tetrahedra.
    Notes: BaNi2P4 wurde durch Erhitzen eines entsprechenden Elementgemenges dargestellt und röntgenographisch mit Einkristallmethoden untersucht. Die Verbindung kristallisiert bei T ≥ 100°C im tetragonalen BaPd2P4-Typ (α-Phase; 14/mmm; a = 6,553(1) Å, c = 5,769(1) Å; Z = 2). Strukturbestimmend sind Ketten kantenverknüpfter NiP4-Tetraeder, die so zueinander orientiert sind, daß P4-Ringe (P—P-Abstand: 2,23 Å) entstehen. Letztere bilden mit den Ni-Atomen Ni8P16-Käfige in Form stark gestauchter abgestumpfter Oktaeder, deren Zentren von Ba-Atomen besetzt werden. Unterhalb von 100°C geht die Struktur von α-BaNi2P4 im Zuge einer Phasenumwandlung höherer Ordnung in eine orthorhombisch verzerrte Variante über (β-Phase; Immm; a = 6,620(1) Å, b = 6,470(1) Å, c = 5,785(1) Å; Z = 2). Dabei spalten die bei α-BaNi2P4 äquidistanten Ni—Ni-Abstände alternierend in kürzere und längere auf. Extended Hückel Rechnungen zeigen, daß die Struktur von β-BaNi2P4 durch eine Peierls-Verzerrung in den Tetraederketten stabilisiert wird.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 941-944 
    ISSN: 0044-2313
    Keywords: GdIII trigonal prismatic complexes ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Reaction of the Lanthanides with Chelate Ligands Synthesis and Crystal Structure of [(py2CH)3Gd]GdBr3 reacts with [(py2CH)Li] to the mononuclear complex [(py2CH)3Gd] 1.The structure of 1 was characterized by X-ray single crystal structure analysis. Space group P21, Z = 2, a = 951.4(10) pm, b = 1369.4(10) pm, c = 1074.5(10) pm, β = 105.69(8)°.The Gd-Ion is surrounded by the six nitrogen atoms of the three chelate ligands and shows a distorted trigonal prismatic coordination. As a difference to the lithium salt of the ligand, the six-membered metalla-cycles in 1 are not planar, but show a boat conformation.
    Notes: GdBr3 reagiert mit [(py2CH)Li] zu dem einkernigen Komplex [(py2CH)3Gd] 1.Der Aufbau von 1 wurde durch eine Kristallstrukturanalyse geklärt: Raumgruppe P21, Z = 2, a = 951,4(10) pm, b = 1369,4(10) pm, c = 1074,5(10) pm, β = 105,69(8)°.Das Gd-Ion ist von den sechs Stickstoff-Atomen der drei Chelatliganden koordiniert und besitzt eine verzerrt trigonalprismatische Umgebung. Die in 1 gebildeten Metalla-Sechsringe sind im Gegensatz zum Lithiumsalz des Liganden nicht planar, sondern zeigen Wannenkonformation.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 948-952 
    ISSN: 0044-2313
    Keywords: Gadolinium(III) ; Samarium(III) ; pentahedral complexes ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Results in the Chemistry of Lanthanoide Complexes. The Crystal Structures of [(C11H21N2)2LnBr] (Ln = Sm, Gd)LnBr3 leads with [(iPr2AIP)Li] (AIP = 2-iPropylamino-4-iPropylimino-2-Pentene) to the mononuclear complex [(iPr2AIP)2LnBr] (Ln = Gd 1, Sm = 2).The structures of 1-2 were characterized by X-ray single crystal structure analysis.1:Space group Cc, Z = 4, a = 1283.3(7) pm, b = 1558.6(8) pm, c = 1330.1(7) pm, β = 90.24(4)°2:Space group Cc, Z = 4, a = 1281.7(2) pm, b = 1562.3(3) pm, c = 1329.8(2) pm, β = 90.09(1)°.The Ln-Ion is coordinated by a Brom-Atom and the four Nitrogen-Atoms of the chelate ligand.
    Notes: LnBr3 reagiert mit [(iPr2AIP)Li] (AIP = 2-iPropylamino-4-iPropylimino-2-Penten) zu dem einkernigen Komplex [(iPr2AIP)2LnBr] (Ln = Gd 1, Sm 2).Der Aufbau von 1-2 konnte durch Kristallstrukturanalyse geklärt werden: 1:Raumgruppe Cc, Z = 4, a = 1283,3(7) pm, b = 1558,6(8) pm, c = 1330,1(7) pm, β = 90,24(4)°.2:Raumgruppe Cc, Z = 4, a = 1281,7(2) pm, b = 1562,3(3) pm, c = 1329,8(2) pm, β = 90,09(1)°. Das Ln-Ion ist durch ein Brom-Atom und die vier Stickstoff-Atome der zwei Chelatliganden fünffach koordiniert.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 963-968 
    ISSN: 0044-2313
    Keywords: Dysprosium sulfidebromide ; dysprosium sulfideiodide ; crystal structure ; magnetic susceptibility ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: DySBr and DySI - Synthesis, Crystal Structure, and MagnetismBy reaction of Dy2S3 with Dy metal and Br2 (I2) at 750°C (900°C), single phase crystalline DySBr (DySI) has been synthesized. Crystal structure refinement of DySBr confirms the FeOCl-type structure (R = 0.049; space group Pmmn, Z = 2, lattice parameters (in Å): a = 5.349(2), b = 4.079(2), c = 8.066(2)) which is also ascertained for DySI (R = 0.059; lattice parameters (in Å): a = 5.320(2), b = 4.168(1), c = 9.224(5)). The magnetic susceptibilities (temperature range 3.4 K - 295 K) can be described on the basis of simple models (cubic crystal field, molecular field approximation) above 5 K and 15 K respectively. The deviations at low temperature are assumed to be related essentially to Dy - Dy exchange interactions which are not adequately described with the molecular field approach.
    Notes: Durch Reaktion von Dy2S3 mit Dy und Br2 (I2) bei 750°C (900°C) entsteht DySBr (DySI) in phasenreiner, kristalliner Form. Für DySBr bestätigt die Strukturverfeinerung den FeOCl-Typ (R = 0,049; Raumgruppe Pmmn; Z = 2; Gitterkonstanten (in Å): a = 5,349(2), b = 4,079(2), c = 8,066(2)), der auch bei DySI vorliegt (R = 0,059; Gitterkonstanten (in Å): a = 5,320(2), b = 4,168(1), c = 9,224(5)). Die magnetischen Suszeptibilitäten (Temperaturbereich 3,4 K - 295 K) lassen sich oberhalb von 5 K (DySBr) bzw. 15 K (DySI) durch einfache Modelle (oktaedrisches Kristallfeld, Molekularfeldnäherung) beschreiben. Abweichungen unterhalb dieser Temperaturen sind im wesentlichen auf kooperative Effekte zurückzuführen, die in der Molekularfeld-Näherung nicht adäquat beschrieben werden.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 969-974 
    ISSN: 0044-2313
    Keywords: Copper(I) selenium tellurium halides ; chalcogen ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: CuSeTeCl, CuSeTeBr, and CuSeTeI: Compounds with ordered ∞1[SeTe] ScrewsThe hitherto unknown copper(I) chalcogen halides CuSeTeCl, CuSeTeBr and CuSeTeI have been prepared and their crystal structures were determined. The compounds of general composition CuSeTeX crystallize in the monoclinic system, space group P21/n (No. 14), Z = 4, a = 7.9796(9), b = 4.7645(8), c = 10.843(3) Å, β = 104.12(1)°, V = 399.8(1) Å3 (X = Cl), a = 8.155(3), b = 4.765(2), c = 11.286(4) Å, β = 104.21(3)°, V = 425.1(3) Å3 (X = Br) and a = 8.4370(9) b = 4.7652(5), c = 11.996(2) Å, β = 103.178(9)°, V = 469.6(1) Å3 (X = I). The crystal structures show infinite onedimensional screws YY′ of chalcogen atoms, with Y = Se and Y′ = Te alternately. The coordinations of Se and Te in these compounds are quite different.
    Notes: Die bisher unbekannten Kupfer(I)-chalkogenhalogenide CuSeTeCl, CuSeTeBr und CuSeTeI wurden erstmals erhalten und ihre Kristallstrukturen bestimmt. Sie kristallisieren monoklin, RG P21/n (Nr. 14), Z = 4, mit a = 7,9796(9), b = 4,7645(8) und c = 10,843(3) Å, β = 104,12(1)°, V = 399,8(1) Å3 (X = Cl), a = 8,155(3), b = 4,765(2) und c = 11,286(4) Å, β = 104,21(3)°, V = 425,1(3) Å3 (X = Br) sowie a = 8,4370(9), b = 4,7652(5) und c = 11,996(2) Å, β = 103,178(9)°, V = 469,6(1) Å3 (X = I). In den Kristallstrukturen liegen eindimensional unendliche Schrauben YY′ vor, mit alternierend Y = Se und Y′ = Te. Die Umgebungen von Se und Te sind deutlich verschieden.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 979-981 
    ISSN: 0044-2313
    Keywords: Tetraphenylphosphonium hexathiocyclodiarsenate(III) ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Cyclic Thioarsenate(III) (PPh4)2As2S6The reaction of Na3AsS4 with tetraphenylphosphonium chloride in ethanol or dimethylformamide proceeds with an intramolecular redox reaction, yielding (PPh4)2As2S6. According to its X-ray crystal structure analysis (4071 reflections, R = 0.070) the anion consists of a six-membered ring of two As and four S atoms in the chair conformation. The As atoms occupy the ring positions 1 and 3, and each of them has an additional terminal S atom.
    Notes: Bei der Umsetzung von Na3AsS4 mit Tetraphenylphosphoniumchlorid in Ethanol oder Dimethylformamid tritt eine intramolekulare Redoxreaktion ein, bei der (PPh4)2As2S6 entsteht. Nach der Röntgenstrukturanalyse (4071 beobachtete Reflexe, R = 7,0%) besteht das Anion aus einem sechsgliedrigen Ring aus zwei As und vier S-Atomen in Sesselkonformation; die beiden As-Atome nehmen die Stellungen 1 und 3 ein und tragen jeweils noch ein terminales Schwefelatom.
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    Zeitschrift für anorganische Chemie 621 (1995), S. 975-978 
    ISSN: 0044-2313
    Keywords: Potassium germanium auride ; synthesis ; single crystals ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: K4Au7Ge2: a Framework Structure with Au7-Double-Tetrahedra and Ge2-Dumb-BellsBlack lustrous, brittle single crystals of a hitherto unknown K4Au7Ge2 were synthesized by the reaction of KN3, germanium- and gold-powder at 550°C. The structure was determined from X-ray single-crystal diffractometry data: space group R3m, Z = 3, a = 6.411(3) Å, c = 27.912(20) Å, R/Rw(w = 1) = 0.046/0.056, Z(Fº2) ≥ 3σ(Fº2) = 302 and N(var.) = 18.K4Au7Ge2 crystallizes in a substitution variant of the MgCu2-type. Gold and germanium form a framework structure that consists of corner-sharing Au7-double-tetrahedra and Ge2-dumb-bells. The potassium atoms occupy channel-like cavities within the gold germanium partial structure.
    Notes: Schwarz glänzende, spröde Einkristalle eines bislang unbekannten K4Au7Ge2 wurden durch Umsetzung von KN3, Germanium- und Goldpulver bei 550°C synthetisiert. Die Struktur wurde aus Röntgen-Einkristall-Diffraktometerdaten bestimmt:Raumgruppe R3m, Z = 3, a = 6,411(3) Å, c = 27,912(20) Å, R/Rw(w = 1) = 0,046/0,056, Z(Fº2 ≥ 3σFº2) = 302 und Z(Var.) = 18.K4Au7Ge2 kristallisiert in einer Substitutionsvariante des MgCu2-Typs. Gold und Germanium bilden eine Gerüststruktur, die aus spitzenverknüpften Au7-Doppeltetraedern und Ge2-Hanteln besteht. Die Kaliumatome besetzen kanalartige Hohlräume innerhalb der Au—Ge-Teilstruktur.
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  • 77
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    Zeitschrift für anorganische Chemie 621 (1995), S. 982-986 
    ISSN: 0044-2313
    Keywords: Fullerides ; crystal structure ; C60- anion ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Electrocrystallization of FulleridesThe fullerides P(C6H5)4C60 · P(C6H5)4Cl, P(C6H5)4C60 · P(C6H5)4Br und As(C6H5)4C60 · As(C6H5)4Cl have been prepared by electrocrystallization. Single crystal structure determinations have shown them to be isostructural in space group I4/m with lattice constants a = 12.5731(9), c = 20.142(3) Å; a = 12.5378(10), c = 20.606(5) Å; a = 12.6003(11), c = 20.377(4) Å, respectively. Spectroscopic and magnetic investigations prove the existence of a C60- anion, showing orientational disorder in all three fullerides.
    Notes: Die Fulleride P(C6H5)4C60 · P(C6H5)4Cl, P(C6H5)4C60 · P(C6H5)4Br und As(C6H5)4C60 · As(C6H5)4Cl wurden durch Elektrokristallisation erhalten. Die Strukturbestimmung an Einkristallen ergab, daß alle drei Verbindungen isotyp in der Raumgruppe I4/m mit den folgenden Gitterkonstanten kristallisieren: a = 12,5731(9), c = 20,142(3) Å; a = 12,5378(10), c = 20,606(5) Å; a = 12,6003(11), c = 20,377(4) Å (Die Zahlen beziehen sich auf die Fulleride in der oben angegebenen Reihenfolge). Spektroskopische und magnetische Untersuchungen belegen die Existenz eines C60--Anions, das im Kristall orientierungsfehlgeordnet vorliegt.
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  • 78
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    Zeitschrift für anorganische Chemie 621 (1995), S. 993-1000 
    ISSN: 0044-2313
    Keywords: Zirconium(IV) fluoride ; hafnium(IV) fluoride ; Cs2Cu3MIVF12 (MIV = Zr, Hf) ; crystal structure ; magnetic properties ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cs2Cu3MIVF12 (MIV = Zr, Hf) - Crystal Structure and Magnetic BehaviourColourless single crystals of Cs2Cu3ZrF12 are obtained by heating the binary fluorides in sealed Pt-tubes under dry argon (solid state reaction, T ≍ 700°C, t ≍ 7-10 d). The compound crystallizes trigonal-rhomboedrical in the space group R3m-D3d5 (Nr. 166); lattice parameters are a = 716.61(6) pm, c = 2 046.4(2) pm, Z = 3 (Four cycle diffractometer data, AED 2). The structure is dominated by layers of corner-sharing, Jahn-Teller-distorted [CuF6]-Octahedra, which are connected via regular [ZrF6]-Octahedra to stackings parallel [00.1]. Cs+-ions are located in the spacings of the octahedra-network. From powder data Cs2Cu3HfF12 with a = 716.32(4) pm, c = 2 048.6(2) pm is isotypic. Both compounds show antiferromagnetic behaviour already at temperatures about 200 K.
    Notes: Durch Umsetzung der binären Fluoride im verschweißten Pt-Rohr unter Schutzgas (Ar, Festkörperreaktion, T ≍ 700°C, t ≍ 20d) erhält man farblose Einkristalle von Cs2Cu3ZrF12. [Trigonal-rhomboedrisch, R3m-D3d5 (Nr. 166), a = 716,61(6) pm, c = 2 046,4(2) pm, Z = 3 (Vierkreisdiffraktometerdaten, AED 2)]. Strukturbestimmend sind Schichten eckenverknüpfter, Jahn-Teller-verzerrter [CuF6]-Oktaeder, welche - über reguläre [ZrF6]-Oktaeder verknüpft - Stapel entlang [00.1] bilden. In den Hohlräumen der Struktur sind Cs+-Ionen eingelagert. Nach Pulverdaten kristallisiert Cs2Cu3HfF12 mit a = 716,32(4) pm, c = 2 048,6(2) pm isotyp. Beide Stoffe zeigen bereits bei Temperaturen um 200 K antiferromagnetisches Verhalten.
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  • 79
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1501-1507 
    ISSN: 0044-2313
    Keywords: Gadolinium carbide chloride ; gadolinium carbide bromide ; terbium carbide bromide ; crystal structure ; Gd—Gd bonds, electrical conductivity ; antiferromagnetism ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Gadolinium Carbide Halides, Gd4C2X3 (X = Cl, Br)The compounds Gd4C2X3 (X = Cl, Br) and Tb4C2Br3 have been prepared by reaction of the metals (RE), REX3, and C in sealed Ta capsules at 1 100° and 1 300°C, respectively. Monophasic samples of Gd4C2Br3 and Tb4C2Br3 were obtained by reacting stoichiometric mixtures of the starting materials for five days. The needle shaped crystals are bronze-coloured and sensitive to air and moisture. Gd4C2X3 crystallizes in the space group Pnma (No. 62) with lattice constants a = 1 059.6(4), b = 368.4(1), c = 1 962.7(8) pm (Gd4C2Cl3), a = 1 084.4(1), b = 373.0(1), c = 2 036.1(1) pm (Gd4C2Br3). According to Guinier photographs, Tb4C2Br3 is isotypic (a = 1 074.3(2), b = 370.6(1), c = 2 019.4(1) pm).In the crystal structure C is octahedrally coordinated by Gd. The Gd6 octahedra are linked via common edges to form corrugated layers. The X-anions coordinate all free edges and corners of these layers and connect them via Xi—Xi contacts parallel [001].Gd4C2Br3 shows metallic conductivity. The magnetic susceptibility follows at high temperatures a Curie Weiss law with an effective moment of 7.95 μB. At temperatures below 50 K antiferromagnetic order is observed.
    Notes: Die Verbindungen Gd4C2X3 (X = Cl, Br) und Tb4C2Br3 werden durch fünftägiges Tempern von Metall, Trihalogenid und C in verschweißten Ta-Kapseln bei Temperaturen zwischen 1 100° und 1 300°C dargestellt. Die Kristalle bilden bronzefarbene Nadeln und sind gegen Luft und Feuchtigkeit mäßig empfindlich. Es liegt die Raumgruppe Pnma (Nr. 62) vor mit den Gitterkonstanten a = 1 059,6(4), b = 368,4(1), c = 1 962,7(8) pm (Gd4C2Cl3), a = 1 084,4(1), b = 373,0(1), c = 2 036,1(1) pm (Gd4C2Br3). Nach Guinier-Aufnahmen ist Tb4C2Br3 isotyp (a = 1 074,3(2), b = 370,6(1), c = 2 019,4(1) pm).In der Kristallstruktur ist C oktaedrisch von Gd koordiniert. Die Gd6-Oktaeder sind über gemeinsame Kanten kondensiert und bilden gewellte Schichten. Die X-Anionen koordinieren alle freien Ecken und Kanten dieser Schichten und verknüpfen sie parallel [001] über Xi—Xi-Kontakte.Gd4C2Br3 zeigt metallisches Verhalten. Die Hochtemperatursuszeptibilität befolgt ein Curie-Weiss-Gesetz mit einem magnetischen Moment von 7,95 μB. Bei Temperaturen unterhalb 50 K findet man langreichweitige antiferromagnetische Ordnung.
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  • 80
    ISSN: 0044-2313
    Keywords: Zirconocene alkynyl alkenyl complex ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of the Zirkonocene Alkynyl Alkenyl Complex (Z)—Cp2Zr(C≡CPh){C(Ph) = C(H)P(SiMe3)2}The reaction of (Z)—Cp2Zr(C(Ph) = C(H)P(SiMe3)2}(Cl) with lithium phenylacetylide yields the zirconocene alkynyl alkenyl complex (Z)—Cp2Zr(C≡CPh){C(Ph) = C(H)P(SiMe3)2} (1). 1 was characterised spectroscopically (IR, NMR, MS) and by X-ray structure determination. The complex crystallises triclinic in the space group P1 with a = 10.561(10), b = 11.226(12), c = 14.274(13) Å, α = 70.87(7), β = 77.70(7), γ = 77.85(7)°. In 1, there are two different Zr—C bond distances (Zr—C(=C) 2.415(6), Zr—C(≡C) 2.309(6) Å). A Zr—P interaction (Zr—P 2.774(3) Å) is observed in the solid state.
    Notes: Die Reaktion von (Z)—Cp2Zr{C(Ph) = C(H)P(SiMe3)2}(Cl) mit Lithiumphenylacetylid liefert den Zirkonocen-Alkinyl-Alkenyl-Komplex (Z)—Cp2Zr(C≡CPh){C(Ph) = C(H)P(SiMe3)2} (1). 1 wurde spektroskopisch (IR, NMR, MS) und röntgenstrukturanalytisch charakterisiert. Die Verbindung kristallisiert triklin in der Raumgruppe P1 mit a = 10,561(10), b = 11,226(12), c = 14,274(13) Å, α = 70,87(7), β = 77,70(7), γ = 77,85(7)°. 1 weist zwei unterschiedliche Zr—C-Bindungslängen auf (Zr—C(=C)) 2,415(6), Zr—C(≡C) 2,309(6) Å). Im Festkörper wird eine Zr—P-Wechselwirkung beobachtet (Zr—P 2,774(3) Å).
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  • 81
    ISSN: 0044-2313
    Keywords: Trifluoromethyliodine tetrafluoride ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Fluorinate with Trifluoromethylhypochlorite CF3OCl. Preparation and Crystal Structure Determination of Trifluoromethyliodine Tetrafluoride CF3IF4The preparation of Trifluoromethyliodine tetrafluoride (CF3IF4), from Trifluoromethyliodide (CF3I) with Trifluoromethylhypochlorite (CF3OCl), and the crystal structure of CF3IF4 at 172(1) K is described. CF3IF4 crystallizes in the monoclinic space group P21/c with a = 762.2(7) pm, b = 842.9(10) pm, c = 856.4(7) pm, β = 99.65(7)° with four formula units per unit cell.
    Notes: Es wird die Darstellung von Trifluormethyliodtetrafluorid (CF3IF4), aus Trifluormethyliodid (CF3I) und Trifluormethylhypochlorit (CF3OCl), sowie die Kristallstrukturanalyse bei 172(1) K beschrieben. CF3IF4 kristallsiert in der monoklinen Raumgruppe P21/c mit a = 762,2(7) pm, b = 842,9(10) pm, c = 856,4(7) pm, β = 99,65(7), Z = 4.
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  • 82
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1232-1236 
    ISSN: 0044-2313
    Keywords: Guanidinium Cyclododecaphosphate Hexahydrate ; preparation ; crystal structure ; phosphate-ring anion ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Darstellung und Kristallstruktur von Guanidiniumcyclododecaphosphat-hexahydrat: [C(NH2)3]12P12O36 · 6H2ODie Titelverbindung, hergestellt durch Ionenaustausch aus dem Kaliumsalz, K12P12O36 · 9,5H2O besitzt einen zweiten neuen Strukturtyp von [P12O36]12- Ringanionen. Das in Wasser wenig lösliche Salz ist hexagonal, P63, mit den Elementarzellparametern: a = 15,904(7), c = 16,67(2) Å und Z = 2.Die Kristallstruktur wurde mit direkten Methoden gelöst und bis zu einem R-Faktor von 0,05 verfeinert. Das um die dreizählige Achse angeordnete Ringanion besitzt daher eine dreizählige Symmetrie. Die gestapelten Ringanionen bilden parallel zur c-Richtung große Kanäle, in die Guanidiniumionen und Wassermoleküle eingebaut sind. Drei der sechs unabhängigen Guanidiniumbaugruppen liegen auf den dreizähligen Achsen.Der Zusammenhalt der Struktur ist auf eine Vielzahl von Wasserstoffbrückenbindungen zurückzuführen, die von den organischen Kationen und den Wassermolekülen ausgehen.
    Notes: The title compound was prepared by ion exchange from the potassium salt, K12P12O36 · 19/2H2O. It represents a second new structural type of [P12O36]12- ring anions. This sparingly water soluble salt is hexagonal, space group P63, with Z = 2 and the cell dimensions: a = 15.904(7), c = 16.67(2) Å. The crystal structure was solved by direct methods and refined to a final R value of 0.050.The ring anion is located around the threefold axis and hence has a threefold symmetry. The stacking of the rings creates large channels, parallel to the c direction, in which the guanidinium groups and the water molecules are located. Three of the six independent guanidinium groups are located on the threefold axes. The cohesion of the structure is performed by the numerous H-bonds generated by the organic cations and the water molecules.
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  • 83
    ISSN: 0044-2313
    Keywords: Pentafluorophenyliodinetetrafluoride ; preparation ; crystal structure ; iodinepentafluoride ; tris(pentafluorophenyl)-bismuth ; pentafluorophenyliodinedifluoride, pentafluoroiodobenzene ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Pentafluorophenyliodine(V) Compounds. 2. Pentafluorophenyliodine Tetrafluoride C6F5IF4: Synthesis via Fluorine-Aryl-Substitution on IF5  -  Properties and Structure. Structural Analysis of the Monovalent Iodine Parent Compound C6F5IThe nucleophilic fluorine-aryl substitution reaction on IF5 with pentafluorophenyl, Bi(C6F5)3, leads to C6F5IF4 in good yields and high purity. The thermal stability of C6F5IF4 and its NMR spectrometric behaviour in solution will be described. The crystal structure of C6F5IF4 will be discussed in comparison to IF5. In addition data of the molecular and crystal structure of the monovalent iodine parent compound C6F5I will be given.
    Notes: Durch nukleophile Fluor-Aryl-Substitution an IF5 mit Pentafluorphenyl, Bi(C6F5)3, gelingt die Darstellung von C6F5IF4 in guten Ausbeuten und hoher Reinheit. Beschrieben wird die thermische Stabilität und das NMR-spektrometrische Verhalten in Lösung. Die Kristallstruktur von C6F5IF4 wird im Vergleich mit IF5 diskutiert. Ferner werden die Molekül- und Kristallstrukturdaten der monovalenten Iodstammverbindung C6F5I mitgeteilt.
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  • 84
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1597-1599 
    ISSN: 0044-2313
    Keywords: Sodium phenoxide methanol ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Methanol as a Ligand in Sodium Phenoxide: The Synthesis and Crystal Structure of [Na(CH3OH)4][OC6H5]By the reaction of sodium and phenol in N-methyl-∊-caprolactam (NMC) sodium phenoxide has been yielded, which forms a complex with the furthermore obtained methanol of [Na(CH3OH)4][OC6H5]. The single crystals crystallize triclinic, space group P1, with the lattice constants a = 6.613(3) Å, b = 10.537(4) Å, c = 10.656(4) Å, α = 108.27(2)°, β = 98.21(2) and γ = 95.26(2)°.Sodium is coordinated by six oxygen atoms of methanol in the form of an octahedron. These coordination polyhedrons are connected by sharing edges forming chain, whereas, the oxygen of phenoxide is not involved in the coordination of sodium. Although it is attached to the chain by hydrogen bonding.
    Notes: Bei der Reaktion von Natrium und Phenol in einer Lösung von N-Methyl-∊-caprolactam (NMC) entsteht Methanol, das mit dem ebenfalls gebildeten Alkalimetallphenolat einen Komplex der Zusammensetzung [Na(CH3OH)4] · [OC6H5] bildet. Die isolierten Kristalle kristallisieren triklin, Raumgruppe P1, mit den Gitterkonstanten a = 6,613(3) Å, b = 10,537(4) Å, c = 10,656(4) Å, α = 108,27(3)°, β = 98.21(2)° und γ = 95,26(2)°. In dem Komplex sind die Natriumionen oktaedrisch von den Sauerstoffatomen des Methanols koordiniert. Die Oktaeder sind über zwei Kanten zu einer Kette ∞2[Na[6]O2[2]O2[1]] miteinander verknüpft. Der Phenolatsauerstoff ist nicht an der Koordination des Natriumions beteiligt und bildet Wasserstoffbrückenbindungen mit den Methanolmolekülen aus.
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  • 85
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1600-1604 
    ISSN: 0044-2313
    Keywords: Dimanganese tin tetrasulfide ; crystal structure ; magnetism ; IR ; Raman ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structure Redetermination and Magnetic Studies on Mn2SnS4The crystal structure of Mn2SnS4 was redetermined by single crystal and powder X-ray studies. It has a deficient NaCl superstructure crystallizing in the orthorhombic space group Cmmm proposed by Wintenberger and Jumas in 1980 (Z = 2, a = 740.7(1), b = 1047.5(1) and c = 366.7(2) pm, Rf = 1.4% for 266 unique reflections with I 〉 0σ1). Some additional reflections, which are not compatible with this cell, can be refined assuming formation of twinned trilling crystals. Mn2SnS4 undergoes antiferromagnetic ordering below 160 K. The effective magnetic moment μeff of Mn2+ is 5.92 B.M. The IR and Raman spectra display 5 and 3 bands in the range 150-320 cm-1, respectively.
    Notes: Die Kristallstruktur von Mn2SnS4 wurde mittels Röntgeneinkristall- und Röntgenpulver-Messungen nachbestimmt. Mn2SnS4 besitzt eine defiziente NaCl-Überstruktur und kristallisiert, wie von Wintenberger und Jumas [6] vorgeschlagen, in der orthorhombischen Raumgruppe Cmmm (Rf = 1,4% für 266 unabhängige Reflexe mit I 〉 0σ1). Die in dieser Zelle nicht indizierbaren Reflexe können unter der Annahme einer Mehrlingsbildung verfeinert werden. Das effektive magnetische Moment μeff von Mn2+ beträgt 5,92 B.M. Unterhalb 160 K liegt eine antiferromagnetische Ordnung vor. Die IR-und Raman-Spektren zeigen 5 bzw. 3 Banden im Bereich von 150-320 cm-1.
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  • 86
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1617-1624 
    ISSN: 0044-2313
    Keywords: Sodium hydrogensulfate ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Structure of New Sodium Hydrogen Sulfates Na(H3O)(HSO4)2, Na2(HSO4)2(H2SO4), and Na(HSO4)(H2SO4)2Three acidic sodium sulfates have been synthesized from the system sodium sulfate/sulfuric acid and have been crystallographically characterized. Na(H3O)(HSO4)2 (A) crystallizes in the space group P21/c with the unit cell parameters a = 6.974(2), b = 13.086(2), c = 8.080(3) Å, α = 105.90(4)°, V = 709.1 Å3, Z = 4. Na2(HSO4)2(H2SO4) (B) is orthorhombic (space group Pna21) with the unit cell parameters a = 9.970(2), b = 6.951(1), c = 13.949(3) Å, V = 966.7 Å3 and Z = 4. Na(HSO4)(H2SO4)2 (C) crystallizes in the triclinic space group P1 with the unit cell parameters a = 5.084(1), b = 8.746(1), c = 11.765(3) Å, α = 68.86(2)°, β = 88.44(2)°, γ = 88.97(2)°, V = 487.8 Å3 and Z = 2.All three compounds contain SO4 tetrahedra as HSO4- anions and additionally in B and C in form of H2SO4 molecules. The ratio H:SO4 determines the connectivity degree in the hydrogen bond system. In A, there are zigzag chains and dimers additionally connected via oxonium ions. Complex chains consisting of cyclic trimers (two HSO4- and one H2SO4) are present in B. In structure C, several parallel chains are connected to columns due to the greater content of H2SO4.Sodium cations show a distorted octahedral coordination by oxygen in all three structures, the NaO6 octahedra being “isolated” (connected via SO4 tetrahedra only) in A. Pairs of octahedra with common edge form Na2O10 dimeric units in C. Such double octahedra are connected via common corners forming zigzag chains in B.
    Notes: Aus dem System Natriumsulfat/Schwefelsäure konnten drei saure Sulfate synthetisiert und strukturell charakterisiert werden. Na(H3O)(HSO4)2 (A) kristallisiert in der monoklinen Raumgruppe P21/c mit den Gitterkonstanten a = 6,974(2), b = 13,086(2), c = 8,080(3) Å, β = 105,90(4)°, V = 709,1 Å3 und Z = 4. Na2(HSO4)2(H2SO4) (B) ist orthorhombisch (Pna21) mit den Gitterkonstanten a = 9,970(2), b = 6,951(1), c = 13,949(3) Å, V = 966,7 Å3 und Z = 4. Na(HSO4)(H2SO4)2 (C) kristallisiert in der triklinen Raumgruppe P1 mit a = 5,084(1), b = 8,746(1), c = 11,765(3) Å, α = 68,86(2)°, β = 88,44(2)°, γ = 88,97(2)°, V = 487,8 Å3 und Z = 2.In allen drei Verbindungen liegen SO4-Tetraeder in Form von HSO4--Anionen und zusätzlich in B und C in Form neutraler H2SO4-Moleküle vor. Das Verhältnis H:SO4 bestimmt den Vernetzungsgrad im Wasserstoffbrückenbindungssystem. In A liegen HSO4-Dimere neben Zick-Zack-Ketten vor, die zusätzlich über Oxoniumionen miteinander vernetzt sind. Für die Struktur von B ist die Bildung von Ketten, die aus cyclischen Trimeren (zwei HSO4- und ein H2SO4) bestehen, charakteristisch. Durch den größeren Anteil an H2SO4 sind in C mehrere parallele Ketten zu Säulen verbunden.Natrium ist in allen drei Strukturen verzerrt oktaedrisch von Sauerstoff koordiniert, wobei in A “isolierte” (nur über SO4-Tetraeder verbundene) NaO6-Oktaeder vorliegen. In C werden zwei Oktaeder über eine Kante zu Na2O10-Doppeloktaedern verbunden. Solche Doppeloktaeder werden in B über Ecken zu Zick-Zack-Ketten verknüpft.
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  • 87
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    Zeitschrift für anorganische Chemie 621 (1995), S. 2034-2042 
    ISSN: 0044-2313
    Keywords: Bismuth nickel iodide ; subhalide ; crystal structure ; chemical bonding ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Bi5,6Ni5I: A Partly Oxidized Intermetallic Phase with Channel StructureBi5,6Ni5I was prepared from the elements by chemical vapour deposition. Single-crystal investigations (space group I2/m, a = 1 852.1(3), b = 418.45(6), c = 1 373.8(3) pm, β = 90.42(2)°, V = 1 064.7(3) · 106 pm3) revealed parallel doublewalled channels of nickel and bismuth atoms. The central pseudo 5 axis of each channel is occupied by 6/5 disordered bismuth atoms per lattice translation along [010]. Double rows of iodine atoms fill the distorted hexagonal arrangement of the channels. Bi5,6Ni5I is stabilized by metallic bonding in the framework metal atoms and additional heteropolar interactions between bismuth and iodine atoms as well as between bismuth and nickel atoms. Bi5,6Ni5I shows metallic conductivity and ferromagnetic ordering below 17 K.
    Notes: Bi5,6Ni5I wurde aus den Elementen durch eine chemische Transportreaktion dargestellt. In der an einem Einkristall bestimmten Struktur (Raumgruppe I2/m, a = 1 852,1(3), b = 418,45(6), c = 1 373,8(3) pm, β = 90,42(2)°, V = 1 064,7(3) · 106 pm3) liegen parallele, doppelwandige Röhren aus Nickel- und Bismutatomen vor. Auf der zentralen Pseudo-5-Achse jedes Kanals finden sich fehlgeordnet 6/5 Bismutatome pro Translationseinheit in Richtung [010]. Die Iodatome bilden Doppelreihen in der verzerrt hexagonalen Anordnung der Röhren. Die Stabilität von Bi5,6Ni5I resultiert aus der metallischen Bindung im Metallatomgerüst sowie aus heteropolaren Wechselwirkungen sowohl zwischen Bismut- und Iodatomen als auch zwischen Bismut- und Nickelatomen. Bi5,6Ni5I ist metallisch leitend und ordnet unterhalb 17 K ferromagnetisch.
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  • 88
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    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 2065-2069 
    ISSN: 0044-2313
    Keywords: Tetraphosphorus hexaoxide monoselenide ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Crystal Structure, and Spectroscopic Characterization of Tetraphosphorus Hexaoxide Monoselenide, P4O6SeP4O6Se has been synthesized by photochemical reaction between P4O6 and elemental selenium in CS2 in presence of iodine as a catalyst. Single crystals form at purification via sublimation. The compound (m. p. 46°C) crystallizes in the monoclinic space group P21/c (no. 14) with a = 1 051.8(2), b = 652.9(1), c = 1 178.6(2) pm, β = 109.29(1)°, Z = 4. Within the limits of experimental error, the molecules exhibit C3v symmetry. IR, Raman, and 31P n.m.r. (solution) spectra of the compound are reported and discussed. The geometry of the Molecule as determined by theoretical methods (SCF level) is in good agreement with the experimental results.
    Notes: P4O6Se wurde durch photochemische Reaktion von P4O6 mit elementarem Selen in CS2 in Gegenwart von Iod als Katalysator dargestellt; Einkristalle entstanden bei der Reinigung durch Sublimation. Die Verbindung (Fp. 46°C) kristallisiert in der monoklinen Raumgruppe P21/c (Nr. 14) mit a = 1 051,8(2), b = 652,9(1), c = 1 178,6(2) pm, β = 109,29(1)°, Z = 4. Im Rahmen der Fehlergrenzen der Strukturbestimmung besitzen die Moleküle C3v-Symmetrie. IR-, Raman- und 31P-Lösungs-NMR-Spektren der Verbindung werden mitgeteilt und diskutiert. Die mit quantenchemischen Methoden auf SCF-Niveau berechnete Molekülgeometrie stimmt mit der experimentell bestimmten gut überein.
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  • 89
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1677-1680 
    ISSN: 0044-2313
    Keywords: Sodium auride indide ; synthesis ; single-crystals ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: NaAuIn2, a Ternary Auride with Ethane Analogous In2Au6 Building Units and ∞1[In2/2] ChainsSilver coloured, brittle single crystals of NaAuIn2 were synthesized by the reaction of NaN3, gold-sponge and indium at 500°C. The structure was determined from X-ray single-crystal diffractometry data: space group Cmcm, Z = 4, a = 4.482(1) Å, b = 10.366(2) Å, c = 7.869(2) Å, R/Rw(w = 1) = 0.017/0.020, Z(F02) ≥ 3σ(F02) = 547 and N(var.) = 16.NaAuIn2 crystallizes in the MgCuAl2-structure type. Gold and indium form a framework structure. ∞2[AuIn6/3] layers with trigonal prismatically coordinated gold are connected via In - In contacts along [010] which consist of ethane analogous In2Au6-building units. The In-partial structure consists of saw tooth like ∞1[In2/2] chains along [001]. The sodium atoms occupy channel-like cavities within the Au - In framework structure.
    Notes: Silberfarbene, spröde Einkristalle von NaAuIn2 wurden durch Umsetzung von NaN3, Goldschwamm und Indium bei 500°C synthetisiert. Die Struktur wurde aus Röntgen-Einkristall-Diffraktometerdaten bestimmt: Raumgruppe Cmcm, Z = 4, a = 4,482(1) Å, b = 10,366(2) Å, c = 7,869(2) Å, R/Rw(w = 1) = 0,017/0,020, Z(F02) ≥ 3σ(F02) = 547 and Z(Var.) = 16.NaAuIn2 kristallisiert im MgCuAl2-Typ. Gold und Indium bilden eine Gerüststruktur. ∞2[AuIn6/3]-Schichten mit trigonal prismatisch koordiniertem Gold werden entlang [010] über In - In-Kontakte verbunden, die aus ethananalogen In2Au6-Baueinheiten bestehen. Die In-Teilstruktur besteht aus sägezahnförmigen ∞1[In2/2]-Ketten entlang [001]. Natrium besetzt kanalartige Hohlräume innerhalb der Au - In-Teilstruktur.
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  • 90
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    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1663-1671 
    ISSN: 0044-2313
    Keywords: tert-Butyliminovanadium(V) trichloride ; coordination compounds ; 1H, 13C, 51V NMR ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Coordination Compounds of tert-Butyliminovanadium(V) Trichloride with O-Donor-LigandsThe reaction of tert-butyliminovanadium(V)trichloride (1) with cyclic and acyclic ethers, ethylene carbonate and thietane has been studied. The 1:1-complexes have a different stability; reversible and irreversible cleavage of ether in the coordination sphere of the vanadium atom rearranging in ω-chloroalkanolato ligands are observed. The reaction of 1 with 2-chloroethanol, 3-chloropropanol and 5-chloropentanol yields the complexes tC4H9N = V(OR)Cl2 (R = CH2CH2CH2CH2CH2Cl) and [tC4H9N = V(OR)Cl2 · ROH]; in the presence of triethylamine the disubstituted compounds tC4H9N = V(OR)2Cl are formed. The 51V NMR spectra are discussed. The crystal structure of [tC4H9N = VCl3 · DME] (12) and [tC4H9N = V(OCH2CH2Cl)Cl2 · HOCH2CH2Cl] (13) has been determined. The vanadium atoms in 13 have a distorted octahedral coordination and are linked by the oxygen atoms of the 2-chloroethanolato ligands forming a binuclear complex. In solution molecular weight measurement and 51V NMR data indicate the equilibrium between a mononuclear complex 13 and its isomer [tC4H9N = V(OCH2CH2Cl)2Cl · HCl].
    Notes: Die Reaktion des tert-Butyliminovanadium(V)-trichlorids (1) mit cyclischen und acyclischen Ethern, Ethylencarbonat und Thietan wurde untersucht. Die 1:1-Komplexe zeigen eine unterschiedliche Stabilität; reversible und irreversible Etherspaltungen in der Koordinationssphäre des Vanadiumatoms unter Umlagerung in ω-Chloralkanolato-Liganden werden beobachtet. Die Reaktion von 1 mit 2-Chlorethanol, 3-Chlorpropanol und 5-Chlorpentanol liefert die Komplexe tC4H9N = V(OR)Cl2 (R = CH2CH2CH2CH2CH2Cl) und [tC4H9N = V(OR)Cl2 ω HOR]; in Gegenwart von Triethylamin als Hilfsbase werden die disubstituierten Verbindungen tC4H9N = V(OR)2Cl gebildet. Die 51V-NMR-Spektren werden diskutiert. Die Kristallstruktur der Komplexe [tC4H9N = VCl3 · DME] (12) und [tC4H9N = V(OCH2CH2Cl)Cl2 · HOCH2CH2Cl] (13) wurde bestimmt. In 13 sind die verzerrt oktaedrisch koordinierten Vanadiumatome über die O-Atome der 2-Chlorethanolato-Liganden zu einem zweikernigen Komplex verknüpft, während in Lösung ein einkerniger Komplex im Gleichgewicht mit dem Isomeren [tC4H9N = V(OCH2CH2Cl)2Cl · HCl] vorliegt.
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  • 91
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    Zeitschrift für anorganische Chemie 621 (1995), S. 1907-1912 
    ISSN: 0044-2313
    Keywords: Aurides ; anti perovskites ; alkali metal halide oxides ; K3BrO, K3IO, K3AuO, Rb3BrO, Rb3IO, Rb3AuO, Cs3BrO, Cs3IO, Cs3AuO ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Crystal Chemical Similarity of Auride and Halide AnionsThe crystallographic properties of the aurides M3AuO and the alkalimetal halide oxides M3XO (M = K, Rb, Cs; × = Br, I) are compared. Rb3BrO, Rb3IO, Cs3BrO, and Cs3IO have been prepared and characterized for the first time: Rb3BrO (a = 5.465(1) Å) crystallizes as a cubic anti perovskite, Cs3BrO (a = 7.800(6), c = 7.122(6) Å) and Cs3IO (a = 8.056(3), c = 7.168(3) Å) as hexagonal anti perovskites, Rb3IO (a = 7.889(1), c = 19.640(1) Å) as a hexagonal anti BaTiO3 type. The analysis of bond lengths, molar volumes and the systematic of the crystal structures leeds to the conclusion, that the crystallographic properties of auride- and bromide anions are similar. The radius of the Au- has been found to be 2.2 Å (KZ 12).
    Notes: Verglichen werden die kristallographischen Eigenschaften der Auride M3AuO und der Alkalimetallhalogenidoxide M3XO (M = K, Rb, Cs; × = Br, I). Rb3BrO, Rb3IO, Cs3BrO und Cs3IO werden erstmals dargestellt und strukturell charakterisiert: Rb3BrO (a = 5,465(1) Å) kristallisiert als kubischer anti-Perowskit, Cs3BrO (a = 7,800(6), c = 7,122(6) Å) und Cs3IO (a = 8,056(3), c = 7,168(3) Å) als hexagonale anti-Perowskite, Rb3IO (a = 7,889(1), c = 19,640(1) Å) im hexagonalen anti-BaTiO3-Typ. Die Analyse der Bindungsabstände und Molvolumina sowie die Systematik der Kristallstrukturen der Verbindungen M3YO (M = K, Rb, Cs; Y = Br, I, Au) belegen die kristallchemische Ähnlichkeit von Aurid- und Bromid-Ionen. Der Wirkungsradius des Au--Ions kann zu 2,2 Å (KZ 12) abgeschätzt werden.
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  • 92
    ISSN: 0044-2313
    Keywords: Lanthanide complexes ; diphosphazane dioxides ; variable temperature NMR ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesen und spektroskopische sowie strukturelle Untersuchungen an Lanthanid-Komplexen mit Diphosphazandioxid-LigandenLanthanidnitrat-Komplexe mit den Diphosphazandioxiden Ph2P(O)N(Pri)P(O)Ph2 (1) und (PhO)2P(O)N(Me)P(O)(OPh)2 (2) wurden dargestellt und mit verschiedenen Methoden untersucht. Ligand (2) kann nach zwei verschiedenen Methoden erhalten werden, nämlich durch Oxidation des Phosph(III)azan-Liganden oder ausgehend von der Phosph(V)azanchloro-Vorstufe. Die Struktur von 2 wird durch die Röntgenanalyse bestätigt: triklin, Raumgruppe P1, a = 10,078(1), b = 10,575(3), c = 12,364(4) Å, α = 75,70(2)°, β = 75,56(1)°, γ = 77,68(1)°, Z = 2, V = 1 220 Å3; verfeinert bis zu RF = 0,0459 an 3 495 Reflexen mit F 〉 3σ(F). Die Phosphazandioxid-Liganden zeigen im festem Zustand trans-Geometrie. Die Struktur des Lanthanid-Komplexes [Pr(NO3)3(2)2] (14) wurde ebenfalls röntgenographisch bestimmt: trigonal, Raumgruppe P32, a = b = 15,710(2), c = 40,067(2) Å, Z = 6, V = 8 564 Å3; verfeinert bis zu RF = 0,0430 an 8 077 Reflexen mit F 〉 5σ(F). Die zwei Diphosphazandioxid-Liganden und die Nitrat-Gruppen sind in Art eines zweizähnigen Chelats an Praseodym koordiniert. Die Geometrie am zehnfach koordinierten Metall ist ein verzerrtes, zweifach bekapptes quadratisches Antiprisma.
    Notes: Lanthanide nitrate complexes of diphosphazane dioxides Ph2P(O)N(Pri)P(O)Ph2 (1) and (PhO)2P(O)N(Me)P(O)(OPh)2 (2) have been synthesised and studied by conductometry, IR, multinuclear NMR spectroscopic methods and X-ray diffraction. Ligand 2 is accessible by two different methods, viz., by direct oxidation of the phosp(III)azane ligand or by starting from phosph(V)azane chloro precursor. The structure of 2 is confirmed by X-ray diffraction. Crystallographic data for 2: Triclinic, Space group P1, a = 10.078(1), b = 10.575(3), c = 12.364(4) Å, α = 75.70(2)°, α = 75.56(1)°, γ = 77.68(1)°, Z = 2, V = 1 220 Å3; structure refined to RF = 0.0459 on 3 495 data with F 〉 3σ(F). The diphosphazane dioxide ligand exhibits trans geometry in the solid state. The structure of a lanthanide complex, [Pr(NO3)3(2)2] (14) is also determined by X-ray diffraction. Crystallographic data for 14: Trigonal, Space group P32, a = b = 15.710(2), c = 40.067(2) Å, Z = 6, V = 8 564 Å3; structure refined to RF = 0.0430 on 8 077 data with F 〉 5σ(F). The two diphosphazane dioxide ligands and the nitrate groups are coordinated to praseodymium in a bidentate chelate fashion. The geometry around the ten coordinated metal is distorted bicapped square antiprism.
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  • 93
    ISSN: 0044-2313
    Keywords: Tris(triphenylphosphine)gold(I)-pentafluorosilicate ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ein neuer einkerniger Gold(I)-Komplex: Synthese und Röntgen-Struktur von [Au{P(C6H5)3}3][SiF5] · 1,5 CH2Cl2Tris(triphenylphosphan)gold(I)-pentafluorosilicat ([Au{P(C6H5)3}3][SiF5]) wurde dargestellt und durch eine Einkristallstrukturanalyse charakterisiert. Der Komplex kristallisiert triklin, Raumtemperatur P1 (Nr. 2) mit a = 14,634(2) Å, b = 17,180(2) Å, c = 22,212(3) Å, α = 86,48(1)°, β = 78,95(1)°, γ = 83,99(1)°, Z = 4. Die Goldatome sind von je drei Triphenylphosphin-Liganden koordiniert zum trigonal-planaren [Au{P(C6H5)3}3]+-Kation. Getrennt davon liegt das trigonal-bipyramidale Anion [SiF5]- vor. Zwischen den Fluor- und Goldatomen wird keine Wechselwirkung beobachtet.
    Notes: Tris(triphenylphosphine)gold(I)-pentafluorosilicate(IV) ([Au{P(C6H5)3}3][SiF5]) was prepared and the structure was determined by single crystal x-ray diffraction. The complex crystallizes in the triclinic space group P1 (No. 2). The lattice constants are a = 14.634(2) Å, b = 17.180(2) Å, c = 22.212(3) Å, α = 86.48(1)°, β = 78.95(1)°, γ = 83.99(1)°. Number of molecules per cell: Z = 4. The gold atoms are coordinated to three triphenylphosphine ligands to form the trigonal planar cation [Au{P(C6H5)3}3]+. Separated from the cation is the [SiF5]- anion which is regular trigonal bipyramidal coordinated. No interactions between the fluorine atoms and the gold atoms were observed.
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  • 94
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    Zeitschrift für anorganische Chemie 621 (1995), S. 29-33 
    ISSN: 0044-2313
    Keywords: Rubidium imido nitrido phosphate(V) ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of Rb8[P4N6(NH)4](NH2)2 with the Adamantane-like Anion [P4N6(NH)4]6-RbNH2 reacts with P3N5 (molar ratio 6:1) at 400°C within 5 d to colourless Rb8[P4N6(NH)4](NH2)2. Suitable crystals for a X-ray structure determination were obtained: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm pnma, Z} = 4,{\rm a} = 17.643(9)\mathop {{\rm A}}\limits^ \circ,{\rm b} = 13.777(9){\rm }\mathop {\rm A}\limits^ \circ,{\rm c} = 8.422(3){\rm }\mathop {\rm A}\limits^ \circ } \\ {{\rm Z(F}\frac{{\rm 2}}{{\rm o}}{\rm )} \ge 3\sigma ({\rm F}\frac{{\rm 2}}{{\rm o}}):1143,{\rm Z(var}{\rm .)} = 98,{\rm R/R}_{\rm w} = 0.038/0.045} \\ \end{array} $$\end{document} The compound contains adamantane-like molecular anions [P4N6(NH)4]6-. Their centres of gravity are arranged in a distorted hexagonal primitive array. All trigonal prisms of this array contain one amide ion. Rubidium ions connect the anions irregularly.
    Notes: RbNH2 reagiert mit P3N5 (Molverhältnis 6:1) bei 400°C in 5 d zu farblosem Rb8[P4N6(NH)4](NH2)2. Dabei werden für eine röntgenographische Strukturbestimmung geeignete Kristalle erhalten: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm pnma, Z} = 4,{\rm a} = 17,643(9)\mathop {{\rm A}}\limits^ \circ,{\rm b} = 13,777(9){\rm }\mathop {\rm A}\limits^ \circ,{\rm c} = 8,422(3){\rm }\mathop {\rm A}\limits^ \circ } \\ {{\rm Z(F}\frac{{\rm 2}}{{\rm o}}{\rm )} \ge 3\sigma ({\rm F}\frac{{\rm 2}}{{\rm o}}):1143,{\rm Z(var}{\rm .)} = 98,{\rm R/R}_{\rm w} = 0,038/0,045} \\ \end{array} $$\end{document} Die Verbindung enthält adamantanartig aufgebaute Molekülanionen [P4N6(NH)4]6-. Ihre Schwerpunkte sind zueinander verzerrt hexagonal primitiv angeordnet. Darin enthalten alle trigonal prismatischen Lücken ein Amidion. Unregelmäßig verknüpfen Rubidiumkationen diese Anionenanordnung.
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  • 95
    ISSN: 0044-2313
    Keywords: Hydrogen selenites ; crystal structure ; IR ; Raman heating ; thermal analysis ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Hydrates M(HSeO3)2 · 4H2O (M = Mg, Co, Ni, Zn) - Crystal Structures, IR, Raman, and Thermoanalytical InvestigationsFrom aqueous solutions of M(HSeO3)2 single crystals of Mg(HSeO3)2 · 4H2O and of the hitherto unknown compounds Co(HSeO3)2 · 4H2O, Ni(HSeO3)2 · 4H2O and Zn(HSeO3)2 · 4H2O could be obtained. The crystal structures, X-ray powder, IR, Raman and thermoanalytical (DTA, TG, Raman heating) data are presented and discussed. The crystal data of the isotypic compounds are: monoclinic, space group C2/c, Z = 4, Mg: a = 1 464.6(2), b = 755.3(1), c = 1 099.9(1) pm, β = 126.59(1)°, V = 0.9769(1) nm3, Co: a = 1 462.5(2), b = 756.5(2), c = 1 102.2(2) pm, β = 126.53(1)°, V = 0.9798(2) nm3, Ni: a = 1 452.2(2), b = 751.0(1), c = 1 091.5(1) pm, β = 126.28(1)°, V = 0.9595(1) nm3, Zn: a = 1 468.3(2), b = 755.8(1), c = 1 103.1(1) pm, β = 126.79(1)°, V = 0.9804(2) nm3. The crystal structures consist of hexagonal packed [M(HSeO3)2 · 2H2O]n chains of [MO4(H2O)2] octahedra linked by Se atoms. They contain trigonal pyramidal SeO2OH-ions with “free” hydroxyl groups and also “free” molecules of water of crystallization. The hydroxyl groups build strong H-bonds (O—H … O distances: 265-268 pm). The IR spectra show AB doublett bands in the OH stretching mode region of the hydroxyl groups. The water molecules of crystallization are linked to planar (H2O)4 tetramers by H-bonds with unusually short O—H … O bond distances of 271-273 pm. DTA and TG measurements indicate that thermal decomposition results in the direct formation of the respective diselenite MSe2O5. Raman heating measurements show under quasi static conditions the intermediate formation of the anhydrous hydrogen selenites.
    Notes: Aus M(HSeO3)2-Lösungen konnten erstmals Einkristalle von Mg(HSeO3)2 · 4H2O sowie die bisher nicht bekannten Verbindungen Co(HSeO3)2 · 4H2O, Ni(HSeO3)2 · 4H2O und Zn(HSeO3)2 · 4H2O erhalten werden. Die Kristallstrukturen, Röntgenpulverdaten, IR- und Raman-Spektren sowie die Ergebnisse thermoanalytischer (DTA, TG, Raman-Heizaufnahmen) Untersuchungen werden mitgeteilt und diskutiert. Die Kristalldaten der isotypen Verbindungen sind: monoklin, Raumgruppe C2/c, Z = 4, Mg: a = 1 464,6(2), b = 755,3(1), c = 1 099,9(1) pm, β = 126,59(1)°, V = 0,9769(1) nm3, Co: a = 1 462,5(2), b = 756,5(2), c = 1 102,2(2) pm, β = 126,53(1)°, V = 0,9798(2) nm3, Ni: a = 1 452,2(2), b = 751,0(1), c = 1 091,5(1) pm, β = 126,28(1)°, V = 0,9595(1) nm3, Zn: a = 1 468,3(2), b = 755,8(1), c = 1 103,1(1) pm, β = 126,79(1)°, V = 0,9804(2) nm3. Die Kristallstrukturen bestehen aus hexagonal gepackten [M(HSeO3)2 · 2H2O]n-Ketten Se-verbrückter [MO4(H2O)2]-Oktaeder. Sie enthalten trigonal pyramidale SeO2OH--Ionen mit „freien“ Hydroxylgruppen und „freie“ Kristallwassermoleküle. Die Hydroxylgruppen bilden starke H-Brücken (O—H … O-Abstände: 265-268 pm). Die IR-Spektren zeigen im Bereich der OH-Streckschwingungen der Hydroxylgruppen AB-Doublett-Banden. Die Kristallwassermoleküle sind zu planaren (H2O)4-Tetrameren mit ungewöhnlich kurzen O—H … Ow-Abständen (271 - 273 pm) H-verbrückt. Die thermische Zersetzung führt nach DTA- und TG-Messungen direkt zum jeweiligen Diselenit MSe2O5. Mittels Raman-Heizaufnahmen unter Quasi-Gleichgewichtsbedingungen konnte erstmals die intermediäre Bildung wasserfreier Hydrogenselenite beobachtet werden.
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  • 96
    ISSN: 0044-2313
    Keywords: 2-Hydroxyaryloximatesmetal chelates ; spectroscopy ; electrochemistry ; crystal structure ; Ni(C9H10NO2)2 ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Spektroskopische und elektrochemische Eigenschaften einiger substituierter Bis(2-hydroxyaryloximato)Co(II), Ni(II), Pd(II) und Cu(II)-Chelate. Struktur des Trans-bis(propanon, 1-[2-hydroxyphenyl]-oximato)Ni(II)Die Reaktionsprodukte von fünf 2-Hydroxyaryloximen mit Ni(II), Pd(II) und Co(II) wurden isoliert und anhand ihrer Elementaranalysen, Leitfähigkeiten, magnetischen Momenten und spektroskopischen Daten (IR, 1H-NMR, UV-VIS in Lösung und im festen Zustand) charakterisiert. Das elektrochemische Verhalten wurde mittels zyklisch-voltametrischer Messungen an Quecksilber- und Kohlefaser-Elektroden bestimmt. Der Einfluß der Substituenten auf die Struktur der Chelate und die Elektronendichteverteilung wird abgeschätzt, diskutiert und mit dem Verhalten der entsprechenden Kupfer(II)-Chelate verglichen.Die Struktur der Titelverbindung Trans-bis(propanon, 1-[2-hydroxyphenyl]-oximato)nickel(II), Ni(C9NH10O2)2 wurde röntgenographisch bestimmt, monoklin, P21/n, mit a = 11,894, b = 5,126, c = 13,668 Å, b̃ = 103,72°, Z = 2. Mit der Methode der kleinsten Quadrate wurde eine Absorptionskorrektur bis zu R = 0,03 durchgeführt. Ni liegt in der äquatorialen Ebene und ist von zwei Stickstoff und zwei Sauerstoff in den Abständen 1,884(3) Å bzw. 1,825(2) Å umgeben.
    Notes: The reaction products of five 2-hydroxyaryloximes with Ni(II), Pd(II), and Co(II) have been obtained and characterized by elemental analyses, conductometric measurements, magnetic moment determination, and spectroscopic methods (IR, 1H NMR, electronic absorption in solutions and in solid state). Cyclic voltammetry on mercury and carbon fibre electrodes has been employed to investigate the electrochemical behaviour in DMF solutions. The effect of substituents on the structure of the chelates and the electron distribution is assessed, discussed and compared with the behaviour of the corresponding copper(II) chelates.The structure of the title compound trans-bis(propanone, 1-[2-hydroxyphenyl]-oximato) nickel(II), Ni(C9H10NO2)2 was determined by X-ray diffraction monoclinic system (space group P21/n), a = 11.894, b = 5.126, c = 13.668 Å, b̃ = 103.72°, Z = 2. The structure was refined by full-matrix least squares to a conventional R = 0.03. Ni is on the equatorial plane and surrounded by two nitrogen and two oxygen at distances 1.884(3) Å and 1.825(2) Å, respectively.
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  • 97
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 675-678 
    ISSN: 0044-2313
    Keywords: Lithium Hydrogensulfate ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of LiHSO4Single crystals of the new compound LiHSO4 are synthezised from the system Lithiumsulfate/Sulfuric acid. The up to day not determined structure of the title compound is monoclinic, space group P21/c with the lattice constants a = 5.234(2), b = 7.322(1) and c = 8.363(1) Å, b̃ = 90.02(2)°. The volume of the unit cell has been determined to V = 320.5 Å3, the number of formula units to Z = 4 and the density to Dx = 2.156 g cm-3.There are crystallographically identical SO3(OH)- and LiO4-tetrahedra in the structure. Every tetraheda is linked to four different tetrahedra of the other sort. Two neighboured LiO4 terahedra form a common edge. In that way layers are formed running parallel the yz-plane. These layers are connected over hydrogen bonds.
    Notes: Im System Lithiumsulfat/Schwefelsäure sind gut ausgebildete Einkristalle von LiHSO4 erhalten worden. Die Verbindung kristallisiert in der monoklinen Raumgruppe P21/c mit den Gitterkonstanten a = 5,234(2), b = 7,322(1) und c = 8,363(1) Å, b̃ = 90,02(2)°. Das Volumen der Elementarzelle wurde zu V = 320,5 Å3, die Zahl der Formeleinheiten zu Z = 4 und die Dichte zu Dx = 2,156 g cm-3 bestimmt.Es liegen kristallographisch identische SO3(OH)- und LiO4-Tetraeder vor. Jedes dieser Tetraeder ist mit jeweils vier verschiedenen Tetraedern der anderen Sorte verbunden. Zwei benachbarte LiO4-Tetraeder bilden jeweils eine gemeinsame Kante aus. Auf diese Weise bilden sich Schichten aus, die parallel der yz-Ebene verlaufen und über Wasserstoffbrückenbindungen miteinander verbunden sind.
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  • 98
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 685-688 
    ISSN: 0044-2313
    Keywords: Copper antimony selenide ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structure of Cu3SbSe3The hitherto unknown crystal structure of Cu3SbSe3 has been determined from single crystals. The compound crystallizes in the orthorhombic system, space group Pnma (No. 62), with a = 7.9865(8), b = 10.6138(9) and c = 6.8372(7) Å, V = 579.6(1) Å3, Z = 4. Most remarkable feature of the structure are groups of three cis-edge-sharing tetrahedra [Cu3Se8] which are interlinked to a threedimensional arrangement by SbSe3-units. In contrast to Cu3SbS3 in the temperature range from -180 to 25°C no hints for a phase transition could be detected by means of X-ray- and thermoanalytical methods.
    Notes: Die bisher unbekannte Kristallstruktur von Cu3SbSe3 wurde aus Einkristalldaten ermittelt. Die Verbindung kristallisiert orthorhombisch, RG Pnma (Nr. 62) mit a = 7,9865(8), b = 10,6138(9) und c = 6,8372(7) Å, V = 579.6(1) Å3, Z = 4. Die Struktur zeichnet sich durch Baugruppen [Cu3Se8] aus drei cis-kantenverknüpften Tetraedern aus, die über ihre Liganden mit SbSe3-Gruppen zu einem dreidimensionalen Netzwerk verknüpft sind. Im Gegensatz zu Cu3SbS3 konnten Hinweise auf eine Phasenumwandlung im Temperaturbereich von -180 bis 25°C weder durch röntgenographische noch durch thermoanalytische Untersuchungen gefunden werden.
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  • 99
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 679-684 
    ISSN: 0044-2313
    Keywords: Sodium oxohydroxoaluminate hydrate ; Na2[Al2O3(OH)2] · 1.5 H2O ; crystal structure ; 27Al NMR ; 23Na NMR ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structure of the Sodium Oxohydroxoaluminate Hydrate Na2[Al2O3(OH)2] · 1.5 H2OThe crystal structure of the sodium oxohydroxoaluminate hydrate Na2[Al2O3(OH)2] ·s 1.5 H2O (up to now described as Na2O · Al2O3 · 2.5 H2O and Na2O · Al2O3 · 3 H2O, respectively) was solved. The X-ray single crystal diffraction analysis (tetragonal, space group P-421m, a = 10.522(1) Å, c = 5.330(1) Å, Z = 4) results in a polymeric layered structure, consisting of AlO3/2(OH) tetrahedral groups. Between these layers the Na+ ions are situated, which form tetrameric groups of face-linked NaO6 octahedra. The involved O2- ions are due to Al—O—Al bridges, Al—OH groups and water of crystallization. 27Al and 23Na MAS NMR investigations confirm the crystal structure analysis. The relations between the crystallization behaviour of the compound and the constitution of the aluminate anions in the corresponding sodium aluminate solution and in the solid, respectively, are discussed.
    Notes: Die Kristallstruktur des Natriumoxohydroxoaluminathydrates Na2[Al2O3(OH)2] · 1,5 H2O - bisher in der Literatur als Na2O · Al2O3 · 2,5 H2O bzw. Na2O · Al2O3 · 3 H2O bezeichnet - wird bestimmt. Die Einkristallröntgenstrukturanalyse (tetragonal, Raumgruppe P-421m, a = 10,522(1) Å, c = 5,330(1) Å, Z = 4) ergibt eine aus AlO3/2(OH)-Tetraedern aufgebaute, polymere Schichtstruktur. Die zwischen den Schichten angeordneten Na+-Ionen bilden mit O2--Ionen von Al—O—Al-Brücken, Al—OH-Gruppen und von Kristallwasser NaO6-Oktaeder, die über gemeinsame Flächen zu tetrameren Baugruppen verknüpft sind. 27Al- und 23Na-MAS-NMR-Messungen bestätigen die Kristallstrukturanalyse. Die Beziehungen zwischen dem Kristallisationsverhalten der Verbindung und der Konstitution der Aluminatanionen in der entsprechenden Natriumaluminatlösung bzw. in der kristallinen Verbindung werden diskutiert.
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  • 100
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 713-718 
    ISSN: 0044-2313
    Keywords: New Lithogermanate ; crystal structure ; MAPLE, CHARDI calculations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The First Oxogermanate with “Stuffed Pyrgoms”: CsNa3Li8{Li[GeO4]}4By heating the binary oxides CsO0.52, NaO0.45, LiO0.5 and GeO2 in the mol. ratio 1.24:1.4:6.7:3.9 (Ni tubes; 600°C/89 resp. 65 d) we obtained for the first time CsNa3Li8{Li[GeO4]}4 in form of pale yellow prisms as well as powder: space group I4/m (I. T. No. 87) with a = 1 120.73(5); c = 651.64(5) pm; Z = 2; (four circle diffractometer data; MoKα; 5 152 Io(hkl); R = 1.7%; Rw = 1.6%), parameters see text. The structure determination confirmes its being isotypic with CsKNaLi9{Li[SiO4]}4, CsKNa2Li8{Li[SiO4]}4 and RbNa3Li8{Li[SiO4]}4. The Madelung part of lattice energy (MAPLE), effective coordination numbers (ECoN), mean fictive ionic radii (MEFIR) and the charge distribution (CHARDI) are calculated.
    Notes: Durch Tempern der binären Oxide CsO0,52, NaO0,45, LiO0,5 und GeO2 im mol. Verhältnis 1,24:1,4:6,7:3,9 (Ni-Bömbchen; 600°C/89 bzw. 65 d) wurden erstmals Einkristalle von CsNa3Li8{Li[GeO4]}4 in Form von schwachgelblichen Prismen sowie blaßgelbem Pulver erhalten: Raumgruppe I4/m (I. T. Nr. 87) mit a = 1 120,73(5); c = 651,64(5) pm; Z = 2; (Vierkreisdiffraktometerdaten; Mo-Kα; 5 152 Io(hkl); R = 1,7%; Rw = 1,6%), Parameter siehe Text. Die Strukturbestimmung belegt die Isotypie mit CsKNaLi9{Li[SiO4]}4, CsKNa2Li8{Li[SiO4]}4 und RbNa3Li8{Li[SiO4]}4. Ferner werden der Madelunganteil der Gitterenergie (MAPLE), Effektive Koordinationszahlen (ECoN), Mittlere Fiktive Ionenradien (MEFIR) und die Ladungsverteilung (CHARDI) berechnet.
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