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  • Inorganic Chemistry  (12)
  • Calcium, Stannylene  (1)
  • 1995-1999  (7)
  • 1985-1989  (4)
  • 1975-1979  (1)
  • 1965-1969
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  • 1
    Electronic Resource
    Electronic Resource
    1,3-Dialkyldiazetidin-2,4-dione Struktur und Molekülspektren (1977)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 1130-1139 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1,3-Dialkyldiazetidin-2,4-diones Structure and Molecular Spectra1,3-Dimethyl- (1) and 1,3-diethyldiazetidin-2,4-dione (2) are prepared by reaction of the corresponding isocyanates with antimony(V) chloride. The vibrational spectra are discussed. The crystal and molecular structure of 1 and the 1H n. m. r. data of 1 and 2 are reported.
    Notes: 1,3-Dimethyl- bzw. 1,3-Diethyldiazetidin-2,4-dion (1) bzw. (2) werden aus den entsprechenden Isocyanaten und Antimon(V)-chlorid dargestellt. Die Schwingungsspektren werden diskutiert, Daten zur Kristall- und Molekülstruktur von 1 sowie die 1H-NMR-Daten von 1 und 2 mitgeteilt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19771100335
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and Characterization of Substituted Benzyl Zinc Derivatives - Molecular Structures of (tmeda) Li-CH (GeMe3)Ph, (tmeda)Zn(CH2Ph)2, (tmeda)Zn[CH(SiMe3)Ph]2, and (tmeda)Zn[CH(SiMe3)Ph]N(H)Si(SiMe3)3Dedicated to Professor Manfred Weidenbruch on the occasion of his 60th birthday. (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 1499-1505 
    Details
    ISSN: 0009-2940
    Keywords: Lithium ; Zine ; Dibenzylzinc ; Tmeda complexes ; Heteroleptic alkylzinc amide ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reaction of lithium phenyl(trimethylsilyl)methanide with phenyl(trimethylsilyl)methylzinc chloride-tmeda in the presence of tmeda yields the addition product, a bis(tmeda)-lithium dialkylchlorozincate. The elimination of lithium chloride leads to the formation of a tmeda adduct of bis[phenyl-(trimethylsilyl)methyl]zinc. The metathesis reaction of phenyl(trimethylsilyl)methylzinc chloride-tmeda with lithium tris(trimethylsilyl)silylamide allows the isolation of the corresponding heteroleptic tmeda complex of an alkylzinc amide. The metalation of phenyl(trimethylstannyl)methane with butyllithium yields the transmetalation product benzyllithium. From the metathesis reaction of this lithium base with anhydrous zinc(II) chloride in the presence of tmeda, the tmeda adduct of dibenzylzinc crystallizes. The molecular structures of (tmeda)Li—CH(GeMe3)Ph, (tmeda)Zn(CH2Ph)2, (tmeda)Zn[CH(SiMe3)Ph]2, and (tmeda)Zn[CH(SiMe3)-Ph[N(H)Si(SiMe3)3 are reported. Whereas lithium bonds in an η3-fashion, the zinc atom forms a σ(Zn—C) bond. The extremely wide Zn—N—Si angle in (tmeda)Zn[CH(SiMe3)-Ph[N(H)Si(SiMe3)3 of 157° is remarkable.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971301024
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  • 3
    Electronic Resource
    Electronic Resource
    Hydrogenolyse kleiner Kohlenstoffringe, XV über die Hydrierung von Dispiro[2.2.2.2]deca-4,9-dien (1987)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 435-438 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On hydrogenation of the title compound 1 with Pd/C 1,4-diethylbenzene (2) is formed in 95% yield, furthermore 1% of cis- and 2% of trans-1,4-diethylcyclohexane (3 und 4) as well as 2% of 6-ethylspiro[2.5]octane (15) are found. With Pt/C the intermediates 7, 12, 13, and 14 and up to 45% of dispiro[2.2.2.2]decane (17) are identified. 17 is hydrogenated with PtO2 in acetic acid to form 1,1,4,4-tetramethylcyclohexane (19).
    Notes: Bei der Hydrierung der Titelverbindung 1 mit Pd/C entsteht zu 95% 1,4-Diethylbenzol (2), daneben noch ca. 1% cis- und 2% trans-1,4-Diethylcyclohexan (3 und 4) sowie 2% 6-Ethylspiro-[2.5]octan (15). Mit Pt/C wird zusätzlich (bis zu 45%) Dispiro[2.2.2.2]decan (17) gebildet, und man erkennt die Zwischenstufen 7, 12, 13 und 14. Mit PtO2 in Eisessig wird 17 weiter zu 1,1,4,4-Tetramethylcyclohexan (19) hydriert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19871200330
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis and Dynamic Behavior of the Dimeric, Monocyclic Barium Bis[bis(isopropyldimethylsilyl)phosphanide] - Molecular Structures of P(SiMe2Ph)3, of Monomeric (thf)4Ba[P(SiMe2iPr)2]2 and of the Dimer {(thf)2Ba[P(SiMe2iPr]2]2}2 (1996)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 129 (1996), S. 1035-1040 
    Details
    ISSN: 0009-2940
    Keywords: Phosphanes ; Bis(silyl)phosphanes ; Tris(silyl)phosphanes ; Phosphanides ; Barium bis(phosphanide) ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Barium bis[bis(trimethylsily)amide] metalates bis(isopropyldimethylsilyl)phosphane (1) to yield nearly quantitatively the corresponding barium bis[bis(isopropyldimethylsilyl)phosphanide] (3). This compound shows a temperature-dependent monomer-dimer equilibrium in toluene solution. Both the isomers were characterized by X-ray crystal structure analyses. The monomeric derivatives precipitate as a tetrakis(tetrahydrofuran) complex with a P-Ba-P bond angle of 139.9°. The barium atoms of the monocyclic, centrosymmetric dimer are pentacoordinated by two tetrahydrofuran molecules, one terminal and two bridging phosphanide ligands. The endo- and exocyclic Ba-P distances with values of 332 and 316 pm, respectively, lie within the characteristic range.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19961290910
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  • 5
    Electronic Resource
    Electronic Resource
    Aufbau von Trimethylsilyl-substituierten Polyedern aus Calcium, Zinn(II) und Phosphor (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 903-913 
    Details
    ISSN: 0044-2313
    Keywords: Phosphanide ; Calcium, Tin ; Bis(trimethylsilyl)phosphanide ; X-ray Structures ; Spectroscopic Data ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Trimethylsilyl Substituted Polyhedra of Calcium, Tin(II), and PhosphorusThe reaction of calcium-bis[bis(trimethylsilyl)amide] with bis(trimethylsilyl)phosphane in thf yields the heteroleptic, dimeric (tetrahydrofuran-O)calcium-bis(trimethylsilyl)amidebis(trimethylsilyl)phosphanide 1 (triclinic, P 1, a = 1066,6(2), b = 1141,3(2), c = 1226,6(2)pm, α = 97,78(3)°, β = 107,47(3)°, γ = 101,12(3)°, Z = 1 dimer). The bridging phosphanide-substituent displays with Ca—P bond lengths of 292,6 and 300,5 pm a distortion of the four-membered Ca2P2-cycle. The reaction with another equivalent of HP(SiMe3)2 in thf leads to the formation of tetrakis(tetrahydrofuran-O)calcium-bis[bis(trimethylsilyl)phosphanide] 2 mit Ca—P distances of 292 pm (monoclinic, P21/c, a = 1626,0(3), b = 1295,3(4), c = 2039,5(5) pm, β = 102,60(2)°, Z = 4). The performance of the reaction in the presence of bis[bis(trimethylsilyl)amino]stannylene yields heterobimetallic compounds with a central polyhedron of Ca-, Sn- and P-atoms. Dependent on the Sn/Ca ratio the isolation of tris(trimethylsilyl)phosphane as well as bis[tris(tetrahydrofuran-O)calcium]-ditin(II)-tetrakis(μ3-trimethylsilylphosphandiide) 3 with a central dicalcia-distanna-tetraphosphacubane-fragment or (thf)2CaSn2[μ-P(SiMe3)2]2[μ3-PSiMe3]2 4 (orthorhombic, Pnma, a = 2247,7(2), b = 1868,9(1), c = 1168,0(1) pm, Z = 4), respectively, succeeds. The Ca—P distances lie at 291 pm.
    Notes: Calcium-bis[bis(trimethylsilyl)amid] reagiert in THF mit Bis(trimethylsilyl)phosphan zu dem heteroleptischen, dimeren (Tetrahydrofuran-O)calcium-bis(trimethylsilyl)amid-bis(trimethylsilyl)phosphanid 1 (triklin, P 1, a = 1066,6(2), b = 1141,3(2), c = 1226,6(2) pm, α = 97,78(3)°, β = 107,47(3)°, γ = 101,12(3)°, Z = 1 Dimeres). Der verbrückend an zwei Calciumatome bindende Phosphanid-Substituent weist mit 292,6 und 300,5 pm sich deutlich unterscheidende Ca—P-Abstände auf. Die Umsetzung mit einem zweiten Äquivalent HP(SiMe3)2 führt in THF zur Bildung von Tetrakis(tetrahydrofuran-O)calcium-bis[bis(trimethylsilyl)phosphanid] 2 mit Ca—P-Bindungslängen von 292 pm (monoklin, P21/c, a = 1626,0(3), b = 1295,3(4), c = 2039,5(5) pm, β = 102,60(2)°, Z = 4). Setzt man Ca[N(SiMe3)2]2 in Anwesenheit von Bis[bis(trimethylsilyl)amino]stannylen mit Bis(trimethylsilyl)phosphan um, so isoliert man heterobimetallische Verbindungen mit einem Polyedergerüst aus Ca-, Sn- und P-Atomen. Je nach Sn/Ca-Verhältnis erhält man neben Tris(trimethylsilyl)phosphan Bis[tris(tetrahydrofuran-O)calcium]-dizinn(II)-tetrakis(μ3-trimethylsilylphosphandiid) 3 mit einem zentralen Dicalcia-distanna-tetraphosphacuban-Fragment oder (thf)2CaSn2[μ-P(SiMe3)2]2[μ3-PSiMe3]2 4 (orthorhombisch, Pnma, a = 2247,7(2), b = 1868,9(1), c = 1168,0(1) pm, Z = 4). Die Ca—P-Abstände bewegen sich um 291 pm.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966220527
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  • 6
    Electronic Resource
    Electronic Resource
    Synthese von substituierten Calcium-bis(disilylamiden) mittels der Transmetallierung von Zinn(II)- und Zinn(IV)-amidenProfessor Max Herberhold zum 60. Geburtstag gewidmet (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1295-1305 
    Details
    ISSN: 0044-2313
    Keywords: Transmetalation ; Calcium, Stannylene ; Tin ; Amide ; NMR Spectroscopy, X-Ray Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Substituted Calcium-bis(disilylamides) by Transmetalation of Tin(II) and Tin(IV) AmidesStannylenes as well as stannanes with substituted disilylamino groups are valuable synthons for the synthesis of alkaline earth metal bis(disilylamides) via the transmetallation reaction. Whereas bis[2,2,5,5-tetramethyl-2,5-disilaaza-cyclo-pentyl]stannylene 1 is a suitable reagent for this type of reaction, bis[trimethylsilyl-tris(trimethylsilyl)silylamino]stannylene 2 (monoclinic, P21/c, a = 1492.6(2), b = 1705.2(2), c = 1865.3(3) pm, β = 109.03(2)º, Z = 4) is not only attacked at the Sn—N-bond but also the N—Si-bond is cleaved by calcium metal. Similar light sensitivity as for 2 is observed for the mercury bis[trimethylsilyl-tris(trimethylsilyl)silylamide] 3, the homolytic M—N-bond cleavage leads to the formation of the trimethylsilyl-tris(trimethylsilyl)silylamino radical (g = 2.00485; a(N) = 16.2 G). The calcium tin exchange reaction of 1 in THF yields tris(tetrahydrofuran-O)calcium-bis[2,2,5,5-tetramethyl-2,5-disilaaza-cyclo-pentanide] 4 (monoclinic, P21/n, a = 1060.9(2), b = 1919.3(5), c = 1686.0(3) pm, β = 90.30(2)º, Z = 4). The stannanes Men-4Sn[N(SiMe3)2]n with n = 1 or 2 are also valuable materials for the synthesis of bis(tetrahydrofuran-O)calcium-bis[bis(trimethylsilyl)amide].
    Notes: Stannylene und Stannane mit substituierten Disilylamino-Substituenten eignen sich als Edukte für die Transmetallierungsreaktion zur Synthese von Calcium-bis(disilylamiden). Anwendung fanden Bis[2,2,5,5-tetramethyl-2,5-disilaaza-cyclo-pentyl]stannylen 1 und Bis[trimethylsilyl-tris(trimethylsilyl)silylamino]stannylen 2 (monoklin, P21/c, a = 1492,6(2), b = 1705,2(2), c = 1865,3(3) pm, β = 109,03(2)º, Z = 4). Bei der Verwendung von 2 greift das destillierte Calcium allerdings nicht nur die Sn - N-, sondern auch die N—Si-Bindung an. Ähnlich wie bei dem Quecksilber-bis[trimethylsilyl-tris(trimethylsilyl)silylamid] 3 beobachtet man bereits bei Tageslicht die homolytische Spaltung der Sn—N- bzw. Hg—N-Bindung und die Bildung des Trimethylsilyl-tris(trimethylsilyl)silylamino-Radikals 5 (g = 2,00485; a(N) = 16,2G). Der heterogen geführte Zinn-Calcium-Austausch bei Verbindung 1 in THF führt in guten Ausbeuten zum Tris(tetrahydrofuran-O)calcium-bis[2,2,5,5-tetramethyl-2,5-disilaaza-cyclo-pentanid] 4 (monoklin, P21/n, a = 1060,9(2), b = 1919,3(5), c = 1686,0(3) pm, β = 90,30(2)º, Z = 4). Auch die Stannane Men-4Sn[N(SiMe3)2]n mit n = 1 oder 2 eignen sich als Synthone zur Synthese von Bis(tetrahydrofuran-O)calcium-bis[bis(trimethylsilyl)amid].
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966220804
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  • 7
    Electronic Resource
    Electronic Resource
    Synthese, Kristallstruktur, Elektronenstruktur, spektroskopische und magnetische Eigenschaften von [VOCl2{P(SiMe3)3}2]: Ein Phosphankomplex mit fehlgeordneter VOCl2-EinheitProfessor Ekkehard Fluck zum 65. Geburtstag gewidmet (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1756-1764 
    Details
    ISSN: 0044-2313
    Keywords: Crystal Structure ; Electronic Structure ; Spectroscopic Data ; Tris(trimethylsilyl)phosphane Complexes ; Vanadium ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Crystal Structure, Electronic Structure, Spectroscopic and Magnetic Properties of [VOCl2{P(SiMe3)3}2]: A Phosphane Complex with a Disordered VOCl2 GroupVOCl3 reacts with P(SiMe3)3 to form blue green crystals of [VOCl2{P(SiMe3)3}2] (1). The X-ray crystal structure analysis of 1 (cubic space group P213: a = 1541.4(1) pm, Z = 4) reveals a slightly distorded trigonal bipyramidal coordination environment for the disordered vanadium(IV) center. Density functional calculations on the compound [VOCl2{P(SiH3)3}2] (2) are in accord with this observation. 1 has been characterized by ESR, vibrational (IR and Raman) and electronic absorption spectroscopy and magnetic measurements. The ESR spectra of 1 in a toluene solution (293 K and frozen solution at 6 K) exhibit hyperfine interactions of the unpaired electron with the 51V center (I = 7/2) and the 31P centers (I = 1/2) of the two equivalent phosphane ligands. The ligand-field transitions of the VOCl2{P}2 chromophore observed in the electronic absorption spectrum have been assigned on the basis of density functional calculations on 2.
    Notes: Bei der Umsetzung von VOCl3 mit P(SiMe3)3 werden blaugrüne Kristalle von [VOCl2{P(SiMe3)3}2] (1) erhalten. Die Kristallstrukturanalyse von 1 (kubische Raumgruppe P213: a = 1541,4(1) pm; Z = 4) zeigt für das fehlgeordnete Vanadium(IV)-Zentrum eine leicht verzerrte, trigonalbipyramidale Umgebung, die durch Dichtefunktionalrechnungen an der Stammverbindung [VOCl2{P(SiH3)3}2] (2) bestätigt wird. Zur Charakterisierung von 1 wurden ESR-, Schwingungs- (IR und Raman) und Elektronenanregungsspektren aufgenommen und die magnetische Suszeptibilität bei Zimmertemperatur bestimmt. Die ESR-Spektren einer Lösung von 1 in Toluol (293 K und gefrorene Lösung bei 6 K) zeigen neben der Hyperfeinwechselwirkung des ungepaarten Elektrons mit dem 51V-Zentrum (I = 7/2) auch eine entsprechende Wechselwirkung mit den 31P-Zentren (I = 1/2) der beiden äquivalenten Phosphanliganden. Die Banden des VOCl2{P}2-Chromophors im Elektronenanregungsspektrum von 1 lassen sich mit Hilfe von Dichtefunktionalrechungen an 2 entsprechenden elektronischen Übergängen zuordnen.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966221021
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  • 8
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    Electronic Resource
    Synthese, NMR-spektroskopische Charakterisierung und Struktur von Bis(1,2-dimethoxyethan-O,O′)barium-bis[1,3-bis(trimethylsilyl)-2-phenyl-1-aza-3-phosphapropenid] (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1237-1242 
    Details
    ISSN: 0044-2313
    Keywords: Barium 1-Aza-3-phosphapropenide ; 1,3-Azaphosphaallyl Anion ; NMR ; X-ray Structure Determination ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, NMR Spectroscopic Characterization and Structure of Bis(1,2-dimethoxyethane-O,O′)barium Bis[1,3-bis(trimethylsilyl)-2-phenyl-1-aza-3-phosphapropenide]Barium-bis[bis(trimethylsilyl)phosphanide] 1 reacts with two equivalents of benzonitrile to give barium bis[1,3-bis(trimethylsilyl)-2-phenyl-1-aza-3-phosphapropenide]; the choice of the solvent determines whether a tris-(tetrahydrofuran)- or a bis(1,2-dimethoxyethane)-complex 2 can be isolated. 2 crystallizes from DME as red cuboids (monoclinic, C2/c, a = 1627.0(3), b = 1836.6(3), c = 1602.5(2) pm; β = 96.071(12)°; V = 4761.7(12); Z = 4; wR2 = 0.0851). The phosphorus atom displays a pyramidal surrounding in contrast to the planar coordination sphere of the nitrogen atom. In addition a twist within the P—C—N skeleton of the heteroallyl anion is observed.
    Notes: Barium-bis[bis(trimethylsilyl)phosphanid] 1 reagiert mit zwei Äquivalenten Benzonitril zu Barium-bis[1,3-bis(trimethylsilyl)-2-phenyl-1-aza-3-phosphapropenid]; durch die Wahl des Lösungsmittels läßt sich entweder der Tris(tetrahydrofuran)- oder der Bis(1,2-dimethoxyethan)-Komplex 2 isolieren. Verbindung 2 kristallisiert aus DME in Form roter Würfel aus (monoklin. C2/c, a = 1627,0(3), b = 1836,6(3), c = 1602,5(2) pm; β = 96,071(12)°; V = 4761,7(12); Z = 4; wR2 = 0,0851). Während die Koordinationssphäre des Stickstoffatoms planar ist, befindet sich das Phosphoratom in einer pyramidalen Umgebung. Zusätzlich beobachtet man im 1-Aza-3-phosphapropenid-Anion eine leichte Verdrillung.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976230809
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  • 9
    Electronic Resource
    Electronic Resource
    Metallderivate von Molekülverbindungen. II. Darstellung und Struktur des β-Kaliumsilanids (1989)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 572 (1989), S. 75-88 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Derivatives of Molecular Compounds. II. Preparation and Structure of β-Potassium SilanideAt -5°C potassium silanide crystallizes from 1,2-dimethoxyethane/n-pentane in a to date unknown low temperature modification {β-form: orthorhombic, Pnma, Z = 4; a = 880.0(2), b = 541.6(1), c = 682.3(1) pm at -110 ± 3°C}. An x-ray structure determination shows the compound to be built up from isolated potassium cations and pyramidal silanide anions without perceptible disorder. Seven counterions make up the coordination sphere of either particle (K⃛Si 356 to 386 pm), two anion-anion contacts (Si⃛Si 355 pm) are observed in addition. The packing of ions represents a defect variant of the barite type, but there are also relationships to the high temperature modification (α-form, rock salt type) and to cesium trihydrogengermanide (thallium iodide type).
    Notes: Kaliumsilanid kristallisiert bei -5°C aus 1,2-Dimethoxyethan/n-Pentan in einer bisher unbekannten Tieftemperatur-Modifikation {β-Form: orthorhombisch, Pnma, Z = 4; a = 880,0(2), b = 541,6(1), c = 682,3(1) pm bei -110 ± 3°C}. Nach den Ergebnissen der Röntgenstrukturanalyse (R = 0,032) baut sich die Verbindung ohne erkennbare Fehlordnung aus isolierten Kalium-Kationen und pyramidalen Silanid-Anionen auf. Zur Koordinationssphäre beider Teilchen gehören sieben Gegenionen (K⃛Si 356 bis 386 pm); beim Anion kommen zwei zusätzliche Kontakte zu gleichnamigen Nachbarn (Si⃛Si 355 pm) hinzu. Die Kristallstruktur stellt eine Defektvariante des Baryt-Typs dar, Verwandtschaft besteht aber auch zur Hochtemperatur-Modifikation (α-Form, Steinsalz-Typ) und zum Caesium-trihydrogengermanidWährend der Name Kaliumsilanid unseres Erachtens eindeutig ist, sollte die homologe Germanium-Verbindung zur Unterscheidung von den binären Phasen Caesium-trihydrogengermanid genannt werden. (Thalliumiodid-Typ).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19895720109
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  • 10
    Electronic Resource
    Electronic Resource
    Amidinokomplexe von Molybdän(V) und Rhenium(V) Die Kristallstruktur von [Cl4Mo{i-Prop-NC(Cl) N-i-Prop}] (1985)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 522 (1985), S. 83-91 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Amidinocomplexes of Molybdenum (V) and Rhenium (V). Crystal Structure of [Cl4Mo{i-Prop-NC(Cl) N-i-Prop}]Molybdenum pentachloride and rhenium pentachloride, respectively, react with di-isopropylcarbodiimide in CCl4-suspensions forming the monomeric amidino complexes [Cl4M{i-prop-NC(Cl)N-i-prop}] (M = Mo, Re). According to the i.r. spectra the C—Cl-amidino ligand is bonded as a chelate. The molybdenum complex is characterized by an X-ray structure determination. It crystallizes in the tetragonalic space group I41/a with 8 formula units in the unit cell (1538 independent, observed reflexions, R = 0.051) with the lattice constants a = 1119 and b = 2332 pm.
    Notes: Molybdänpentachlorid bzw. Rheniumpentachlorid reagieren mit Di-isopropylcarbodiimid in CCl4-Suspensionen unter Bildung der monomeren Amidinokomplexe [Cl4M{i-Prop-NC(Cl)N-i-Prop}] (M = Mo, Re). nach den IR-Spektren ist der C-Chlor-amidinoligand als Chelat gebunden. Der Molybdänkomplex wurde durch eine röntgenorgraphische Strukturanalyse charakterisiert. Er kristallisiert in der tetragonalen Raumgruppe 141/a mit 8 Formeleinheiten pro Elementarzelle (1538 unabhängige, beobachtete Reflexe, R = 5,1%) mit den Gitterabmessungen a = 1119 und b = 2332 pm.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19855220310
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