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  • Syntheses  (10)
  • synthesis  (7)
  • syntheses  (5)
  • IR Spectrum  (3)
  • Molybdenum  (2)
  • Nitrido ligand  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 606 (1991), S. 73-78 
    ISSN: 0044-2313
    Keywords: Complexes of tetraselenium-dinitride ; syntheses ; IR-spectra ; 119Sn-Mössbauer spectrum ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Donor-Acceptor Complexes [SnCl4(Se4N2)2] and [TiCl4(Se4N2)]The donor-acceptor complexes [SnCl4(Se4N2)2] and [TiCl4(Se4N2)] have been prepared by the reactions of Se4N2 with SnCl4 and TiCl4, respectively, in CH2Cl2 suspensions, forming red-brown, moisture sensitive crystal powders. The complexes are characterized by i. r. spectroscopy, the tin compound additionally by 119Sn Mössbauer spectroscopy. According to the spectra, in the tin complex both Se4N2 molecules are bonded with one of the nitrogen atoms at the tin atom in transposition (symmetry Ci), whereas in the titanium complex we assume both nitrogen atoms to be bonded in a chelating fashion at the titanium atom.
    Notes: Die Donorakzeptorkomplexe [SnCl4(Se4N2)2] und [TiCl4(Se4N2)] werden aus den Komponenten Se4N2 und SnCl4 bzw. TiCl4 in CH2Cl2-Suspensionen in Form rotbrauner, feuchtigkeitsempfindlicher Kristallpulver hergestellt. Die Komplexe werden durch ihre IR-Spektren, die Zinnverbindung zusätzlich durch das 119Sn-Mößbauer-Spektrum charakterisiert. Danach sind die Se4N2-Moleküle in der Zinnverbindung in trans-Position über je ein N-Atom an das Zinnatom koordiniert (Symmetrie Ci), während in dem Titankomplex vermutlich beide N-Atome des Se4N2-Moleküls chelatartig an das Titanatom gebunden sind.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 507-512 
    ISSN: 0044-2313
    Keywords: Phosphoraneiminato Complex of Molybdenum ; Synthesis ; IR Spectrum ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: [Mo(NPPh3)4]2+ [MoNCl3(NPPh3)]2- · C7H8, a Phosphoraneiminato Complex with a Dication of Molybdenum(VI).The title compound was prepared by the reaction of MoNCl3 with Me3SiNPPh3 in acetonitrile solution. Red single crystals separated upon addition of toluene. They were characterized by IR spectroscopy and by an X-ray structure determination. (Space group P1, Z = 2, 6918 observed unique reflections, R = 0.059. Lattice dimensions at 20°C: a = 1 181.4, b = 2 021.4, c =2 409.7pm; α = 65.87°, β = 101.09°, γ= 78.97°). In the dication [Mo(NPPh3)4]2+ the molybdenum atom is surrounded in a tetrahedral fashion by the four nitrogen atoms of the phosphorane iminato ligands. The MoN and PN bond lengths correspond well with double bonds. In the two anions [MoNCl3(NPPh3)]-, which occur in different conformations, the molybdenum atoms are fivefold coordinated by the terminal nitride ligand Mo≡N: in axial positions and by the three chlorine atoms and the nitrogen atom of the (NPPh3)- ligand in the equatorial positions.
    Notes: Die Titelverbindung entsteht in Form leuchtend roter Einkristalle bei der Einwirkung von Me3SiNPPh3 auf MoNCl3 in Acetonitrillösung nach Zugabe von Toluol. Sie wird durch das IR-Spektrum und eine röntgenographische Strukturanalyse charakterisiert. Raumgruppe P1, Z = 2, 6918 beobachtete unabhängige Reflexe, R = 5,9%. Gitterabmessungen bei 20°C: a = 1 181,4; b = 2 021,4; c = 2 409,7pm; α = 65,87°; β = 101,09°; γ= 78,97°. In dem Dikation [Mo(NPPh3)4]2+ ist das Molybdänatom tetraedrisch von den vier N-Atomen der Phosphaniminatoliganden umgeben mit MoN- und PN-Abständen, die Doppelbindungen entsprechen. Die beiden symmetrieunabhängigen Anionen [MoNCl3(NPPh3)]- besitzen verschiedene Konformationen. In ihnen sind die Molybdänatome fünffach von dem terminalen Nitridoliganden Mo≡N: in axialer Position und von den drei Chloratomen und dem N-Atom des Phosphaniminatoliganden Äquatorial koordiniert.
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  • 3
    ISSN: 0044-2313
    Keywords: Polytellurides ; Syntheses ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structures of the Polytellurides [Ca(DMF)6]Te4, [Sr(15-Crown-5)2]Te4 · H2O, {[BaCl(18-Crown-6)(DMF)2]2[BaCl(18-Crown-6)(DMF) (H2O)]2(Te4)2}, and [Ph3PNPPh3]2Te5 · 2 DMFThe title compounds were formed by alkalimetal polytelluride solutions in dimethylformamide (DMF) in the presence of the corresponding counter ions as well as in the presence of 15-crown-5 or 18-crown-6. Single crystals were obtained upon using additional diethylether.[Ca(DMF)6]Te4: Space group C2/c, Z = 4, 1024 observed unique reflections, R = 0.055. Lattice dimensions at -70°C: a = 1776.1; b = 813.0 c = 2545.9pm; β = 102.90°. The compound consists of centrosymmetric [Ca(DMF)6]2+ ions, in which the calcium ions are octahedrally coordinated by the six oxygen atoms of the DMF molecules, and chain-like Te42-[Sr)15-crown-5)2]Te4 · H2O: Space group C2/c, Z = 4, 3322 observed unique reflections, R = 0.058. Lattice dimensions at -70°C: a = 1450.5; b = 1407.3; c = 1660.9 pm; β = 110.22°. The compounds forms centrosymmetric cations [Sr(15-crown-5) 2]2+, in which the Sr2+ ion is sandwich-like surrounded by the ten oxygen atoms of the crown ether molecules, and chain-like Te42- ions, which are associated in the lattice forming polymeric chains.{[BaCl(18-crown-6)(DMF) 2]2[BaCl(18-crown-6)(DMF)· (H2O)] 2(Te4)2}: Space group P1, Z = 1, 3189 observed unique reflections, R = 0.054. Lattice dimensions at 19°C: a = 986.1; b = 1052.8; c = 2696.4 pm; α = 89.34°; β = 88.68°; γ = 89.56°. The compound consists of chain-like Te42- ions without symmetry and of the two somewhat different cations [BaCl(18-crown-6)(DMF) 2]22+, in which the Ba2+ ions dimerize via centroysmmetric rings. Along with the six oxygen atoms of the crown ether molecules and the oxygen atoms of the DMF molecules, the oxygen atoms of the DMF and water molecule, respectively, the Ba+ ions achieve coordination number ten.[Ph3PNPPh3]2Te5 · 2DMF: Space group Pc, Z = 2, 5971 observed unique reflections, R = 0.058. Lattice dimensions at 20°C: a = 20°C: a = 1085.2; b = 1287.0; c = 2715.9 pm; β = 90.19°. The compounds consists of [Ph3PNPPh3]+ ions, chain-like Te52- ions, and incorporate DME molecules without bonding interaction. The 52- ions are associate via polymeric chains in which left- and right handed individuals are alternating.
    Notes: Die Titelverbindungen entstehen aus Alkalipolytelluridlösungen in Dimethylformamid (DMF) in Gegenwart der entsprechenden Gegenionen und der Kronenether 15-Krone-5 bzw. 18-Krone-6. Einkristalle werden durch Zusatz von Diethylether gebildet.[Ca(DMF)6]Te4: Raumgruppe C2/c, Z = 4, 1024 beobachtete unabhängige Reflexe, R = 0,055. Gitterabmessungen bei -70°C: a =1 776,1; b =813,0; c = 2 545,9 pm; β = 102,90°. Die Verbindung besteht aus zentrosymmetrischen Kationen [Ca(DMF)6]2+, in denen die Calciumionen oktaedrisch von den sechs O-Atomen der DMF-Moleküle umgeben sind, und Te42--Ionen mit Kettenstruktur.[Sr(15-Krone-5)2]Te4 · H2O: Raumgruppe C2/c, Z = 4, 3322 beobachtete unabhängige Reflexe, R = 0,058. Gitterabmessungen bei -70°C: a = 1 450,5; b = 1 407,3; c = 1 660,9 pm; β = 110,22°. Die Verbindung bildet Kationen [Sr(15-Krone-5)2]2+, in denen das Strontiumion zentrosymmetrisch und sandwichartig von den zehn O-Atomen der beiden Kronenethermoleküle umgeben ist, sowie kettenförmigen Te42--Ionen, die im Gitter zu polymeren Tellursträngen assoziiert sind.{[BaCl(18-Krone-6)(DMF)2]2[BaCl(18-Krone-6)(DMF)· (H2O)]2(Te4)2}: Raumgruppe P1, Z = 1, 3189 beobachtete unabhängige Reflexe, R = 0,054. Gitterabmessungen bei 19°C: a = 986,1; b = 1 052,8; c = 2 696,4 pm; α = 89,34°; β = 88,68°; γ= 89,56°. Die Verbindung besteht aus kettenförmigen Tetratelluridionen ohne Symmetrie und den beiden etwas verschiedenen Kationen [BaCl(18-Krone-6)(DMF)2]22+ und [BaCl(18-Krone-6)(DMF)(H2O)]22+. In diesen sind die Bariumionen zentrosymmetrisch über BaCl2Ba-Brücken dimerisiert, wodurch die Ba2+-Ionen mit den sechs O-Atomen des Kronenethers und den O-Atomen der DMF-Moleküle bzw. denen des DMF- und des H2O-Moleküls die Koordinationszahl zehn erreichen.[Ph3PNPPh3]2Te5 · 2 DMF: Raumgruppe Pc, Z = 2, 5971 beobachtete unabhängige Reflexe, R = 0,058. Gitterabmessungen bei 20°C: a = 1 085,2; b = 1 287,0; c = 2 715,9 pm; β = 90,19°. Die Verbindung besteht aus [Ph3PNPPh3]+-Ionen, kettenförmigen Pentatelluridionen und eingelagerten DMF-Molekülen ohne bindende Wechselwirkung. Die Te52--Ionen sind zu unendlichen Ketten assoziiert, wobei links- und rechtsdrehende Individuen einander abwechseln.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1011-1015 
    ISSN: 0044-2313
    Keywords: New modification of Se4N4 ; Synthesis ; IR Spectrum ; 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 a New Modification of Tetraselenium Tetranitride, Se4N4β-Se4N4 has been prepared by the reaction of selenium dioxide with the phosphane imine Me3SiNPMe3 in acetonitrile, forming red-brown crystal needles. The crystal structure analysis shows a new modification, the IR spectrum of which differs only slightly from the known α-form of Se4N4 (space group C2/c).β-Se4N4: Space group P21/n, Z = 4, structure solution with 1 667 observed unique reflections, R = 0.054. Lattice dimensions at -50°C: a = 881.8(2), b = 738.7(2), c = 899.6(2) pm, β = 93.58(1)°. Just as the α-form β-Se4N4 forms cage molecules without symmetry and intramolecular Se—Se contacts of 273.2 and 274.0 pm. There are strong Se…N-interactions between the Se4N4 molecules.
    Notes: β-Se4N4 entsteht in Form rotbrauner Kristallnadeln bei der Reaktion von Selendioxid mit dem Phosphanimin Me3SiNPMe3 in Acetonitrillösung. Die Kristallstruktur-analyse ergab das Vorliegen einer neuen Modifikation, deren IR-Spektrum sich nur wenig von der bekannten α-Form des Se4N4 (Raumgruppe C2/c) unterscheidet.β-Se4N4: Raumgruppe P21/n, Z = 4, Strukturlösung mit 1 667 beobachteten unabhängigen Reflexen, R = 0,054. Gitterkonstanten bei -50°C: a = 881,8(2); b = 738,7(2); c = 899,6(2) pm, β = 93,58(1)°. β-Se4N4 bildet wie die α-Form Käfigmoleküle, die ohne Symmetrie sind und zwei intramolekulare Se—Se-Kontakte von 273,2 und 274,0 pm ausbilden. Zwischen den Molekülen bestehen starke Se…N-Wechselwirkungen.
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  • 5
    ISSN: 0044-2313
    Keywords: Zinc Complexes ; Syntheses ; IR Spectra ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses and Crystal Structures of the Zincates [Na(12-Crown-4)2][Zn{N(SiMe3)2}3] and [Na(12-Crown-4)2]2[Zn(C≡C-Ph)3(THF)][Zn(C≡C-Ph)3]The homoleptic amido complex [Na(12-crown-4)2][Zn{N(SiMe3)2}3] (1) is prepared from Zn[N(SiMe3)2]2 and NaN(SiMe3)2 in toluene solution in the presence of 12-crown-4. Single crystals of 1 · 0,5 C6H14 can be obtained from diethylether/hexane solutions. 1 reacts with phenylacetylene to give [Na(12-crown-4)2][Zn(C≡C-Ph)3] (2) which forms single crystals 2 · 0.5 THF from tetrahydrofurane solutions. The complexes were characterized by IR spectroscopy and by crystal structure determinations.
    Notes: Der homoleptische Amidokomplex [Na(12-Krone-4)2][Zn{N(SiMe3)2}3] (1) entsteht aus Zn[N(SiMe3)2]2 und NaN(SiMe3)2 in Toluol-Lösung in Gegenwart von 12-Krone-4. Einkristalle von 1 · 0,5 C6H14 erhält man aus Diethylether/Hexan-Lösungen. 1 reagiert mit Phenylacetylen unter Bildung von [Na(12-Krone-4)2][Zn(C≡C-Ph)3] (2), das nach Kristallisation aus Tetrahydrofuran Einkristalle 2 · 0,5 THF bildet. Die Komplexe werden IR-spektroskopisch und durch Kristallstrukturanalysen charakterisiert.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 351-356 
    ISSN: 0044-2313
    Keywords: Organomanganese Compounds ; Phosphoraneiminato Complexes ; Syntheses ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Organomanganese Phosphoraneiminato Complexes with Heterocubane StructureThe organomanganese phosphoraneiminato complexes [MnR(NPEt3)]4 (R = Me, C=C—Ph, C=C—Tol, C=C—CMe3, C=C—SiMe3) with heterocubane structures have been prepared by reaction of the bromo derivative [MnBr(NPEt3)]4 with the corresponding lithium reagents LiR in THF/hexane solution, forming shiny red, very reactive compounds which are well soluble in hydrocarbons. They were characterized by mass spectroscopy, IR spectroscopy and by crystal structure determinations. According to these the compounds form nearly perfect Mn4N4 heterocubane frameworks with m̈3-N bridges of the phosphoraneiminato groups with Mn—N bond lengths of 214.5 pm in average which leads to Mn … Mn contacts of 299.5 pm in average. The organic residues R are terminal bonded with Mn—C distances Mn—Me of 219.5 pm and Mn—C=C—R of 207.6 pm in average.
    Notes: Die organisch substituierten Phosphanimi nato-Komplexe des Mangan(II) mit Heterocubanstruktur [MnR(NPEt3)]4 (R = Me, C=C—Ph, C=C—Tol, C=C—CMe3, C=C—SiMe3) werden durch Reaktion des Bromoderivates [MnBr(NPEt3)]4 mit den entsprechenden Lithium-Reagentien LiR in THF/Hexan als leuchtend rote, sehr reaktive, in Kohlenwasserstoffen leicht lösliche Verbindungen erhalten. Sie werden durch die Massen- und IR-Spektren sowie durch Kristallstrukturanalysen charakterisiert. Danach werden je vier Manganatome über je vier m̈3-N-Atome der Phosphan-iminato-Gruppen zu nur wenig verzerrten m̈3-N4-Kuben mit Mn—N-Abständen von im Mittel 214,5 pm verbrückt, was zu Mn … Mn-Kontakten von 299,5 pm führt. Die Reste R sind terminal gebunden mit Mn—C-Abständen Mn—Me von 219,5 pm und Mn—C=C—R von im Mittel 207,6 pm.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 596 (1991), S. 55-61 
    ISSN: 0044-2313
    Keywords: Crown ether complexes ; tellurium ; antimony ; syntheses ; i.r. spectra ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Crown Ether Complexes [K(15-Crown-5)2]3[Sb3I12], [TeCl3(15-Crown-5)][TeCl5], and [TeCl3(15-Crown-5)]2[TeCl6]Orange-coloured crystals of [K(15-crown-5)2]3[Sb3I12] are formed in the reaction of potassium iodide with antimony triiodide and 15-crown-5 in acetonitrile solution. An X-ray structure determination reveals severe disorder of the crown ether molecules, which coordinate to the potassium atoms in a sandwich array; so only the [Sb3I12]3- ion and the potassium positions were ascertained. The anion is a centrosymmetric trimer (symmetry C2h), which can be understood as central SbI63- ion, coordinated by two SbI3 molecules. (Space group C2/m), Z = 2, 3263 observed, independent reflections, R = 0.06, lattice dimensions at 20°C: a = 2541.1 pm, b = 1441.7 pm, c = 1588.4 pm, β = 113.33°.The tellurium complexes [TeCl3(15-crown-5)] [TeCl5] and [TeCl3(15-crown-5)]2[TeCl6] are prepared by reaction of TeCl4 with 15-crown-5 in acetonitrile solution, forming yellow-green crystals sensitive to moisture. They are characterized by their i.r. spectra.
    Notes: Orange Kristalle [K(15-Krone-5)2]3[Sb3I12] entstehen durch Einwirkung von Kaliumiodid auf Antimontriiodid bei Anwesenheit von 15-Krone-5 in Acetonitrillösung. Wegen Fehlordnung der die Kaliumionen sandwichartig koordinierenden Kronenethermoleküle konnten röntgenogrpahisch in der Struktur nur das [Sb3I12]3--Ion sicher aufgeklärt werden. Es bildet ein zentrosymmetrisches Trimer (Symmetrie C2h), das sich als zentrales SbI63--Ion mit zwei koordinierten SbI3-Molekülen auffassen läßt. Raumgruppe C2/m, Z = 2, 3263 unabhängige beobachtete Reflexe, R = 6,2%. Gitterabmessungen bei 20 °C: a = 2541,1; b = 1441,7; c = 1588,4 pm, β = 113,33°.Die Tellurokomplexe [TeCl3(15-Krone-5)] [TeCl5] und [TeCl3(15-Krone-5)]2[TeCl6] entstehen aus TeCl4 und 15-Krone-5 in Acetonitrillösung als gelbgrüne, feuchtigkeitsempfindliche Kristalle, die durch ihre IR-Spektren charakterisiert werden.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 596 (1991), S. 133-138 
    ISSN: 0044-2313
    Keywords: Benzamidinium hexachlorostannate ; synthesis ; crystal structure ; i.r. spectrum ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Benzamidinium Hexachlorostannate: Synthesis and Crystal Structure[Ph—C(NH2)2SnCl6] has been prepared by the reaction of hydrogen chloride with the amidinato complex [Ph—C(NSiMe3)2SnCl3] in CH2Cl2 solution, forming colourless crystals. which were characterized by IR spectroscopy as well as by an X-ray structure determination. Space group P21/c, Z = 4, 3070 observed unique reflexions, R = 0.029. Lattice dimensions at -50°C: a = 892.5, b = 1076.7, c = 1175.6 pm, β = 109.3°. The compound consists of benzamidinium ions C6H5—C(NH2)2+ and anions SnCl62-, which are connected by a network of N—H…Cl hydrogen bridges.
    Notes: [Ph—C(NH2)2]2SnCl6 entsteht in Form farbloser Einkristalle durch Einwirkung von Chlorwasserstoff auf eine Lösung des Amidinatokomplexes [Ph—C(NSiMe3)2SnCl3] in Dichlormethan. Die Verbindung wird durch das IR-Spektrum und durch eine röntgenographische Strukturanalyse charakterisiert. Raumgruppe P21/c, Z = 4, 3070 beobachtete unabhängige Reflexe, R = 2,9%. Gitterabmessungen bei -50°C: a = 892,5; b = 1076,7; c = 1175,6 pm; β = 109,3°. Die Verbindung besteht aus Benzamidinium-Kationen C6H5—C(NH2)2+ und SnCl62--Ionen, in denen ein Netz von N—H…Cl-Wasserstoffbrücken besteht.
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  • 9
    ISSN: 0044-2313
    Keywords: Chalcogeno-fluorotungstates ; syntheses ; i.r. spectra ; crystal structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chalcogeno-Fluoro-Tungstates. The crystal Structures of [Na-15-Crown-5]2[WO2F3]2 ·2 CH3CN and [Na-15-Crown-5]2[WOSF3]2 · 2 CH3CNThe reaction of sodium fluoride with WSCL4 in acetonitrile solution successively leads in the presence of 15-crown-5 to the complexes [Na-15-crown-5][WSCl4F], [Na-15-crown-5]2[WSCl2F3], and [Na-15-crown-5][WSF5]. These complexes are characterized by their i.r. spectra. In acetonitrile partial hydrolysis of [Na-15-crown-5][WSF5] leads to [Na-15-crown-5]2[WSOF3]2 · 2 CH3CN; likewise one obtains [Na-15-crown-5]2[WO2[WO2F3]2] · 2 CH3CN from [Na-15-crown-5]2[WSOF7] by partial hydrolysis. X-ray structural analyses were carried out for both these chalcogeno complexes. [Na-15-crown-5]2[WO2F3]2 · 2 CH3CN: space group P1, Z = 1, 2316 unique observed reflexions, R = 0.036. Lattice dimensions at -65°C: a = 851.0, b = 1064.6, c = 1130.2 pm, α = 105.18°, β = 95.12°, γ = 102.48°.[Na-15-crown-5]2[WOSF3]2 · 2 CH3CN: space group P1, Z = 1,2472 unique observed reflexions, R = 0.030. Lattice dimensions at -80°C: a = 856.3, b = 1062.8, c = 1181.1 pm, α = 107.68°, β = 95.52°, γ = 102.65°.Both compounds are isotypical with each other; they form ion triples which originate from two short Na…F-contacts of 232 pm each with the four axially arranged fluorine ligands of the dimeric anions [WO2F3]22- and [WSOF3]22-, respectively. The dimerization takes place via angular fluoro bridges with W—F-bondings which are only slightly differing in length. The chalcogeno ligands are in the trans-positions to the bridging fluorine atoms.
    Notes: Die Reaktion von Natriumfluorid mit WSCl4 in Acetonitrillösung führt in Gegenwart von 15-Krone-5 schrittweise zu den Komplexen [Na-15-Krone-5][WSCl4F], [Na-15-Krone-5][WSCl2F3] und [Na-15-Krone-5][WSF5], die durch ihre IR-Spektren charakterisiert werden. Partielle Hydrolyse von [Na-15-Krone-5][WSF5] führt in Acetonitril zu [Na-15-Krone-5]2[WSOF3]2 · 2 CH3CN, ebenso erhält man aus [Na-15-Krone-5][WF7] durch partielle Hydrolyse [Na-15-Krone-5]2[WO2F3]2 · 2 CH3CN. Von beiden Chalkogenokomplexen wurden röntgenographische Strukturanalysen ausgeführt.[Na-15-Krone-5]2[WO2F3]2 · 2 CH3CN: Raumgruppe P1, Z = 1, 2316 unabhängige beobachtete Reflexe, R = 3,6%. Gitterkonstanten bei -65°C: a = 851,0; b = 1064,6; c = 1130,2 pm; α = 105,18°; β = 95,12°; γ = 102,48°. [Na-15-Krone-5]2[WOSF3]2 · 2 CH3CN: Raumgruppe P1, Z = 1, 2472 unabhängige beobachtete Reflexe, R = 3,0%. Gitterkonstanten bei -0°C: a = 856,3; b = 1062,8; c = 1181,1 pm; α = 107,68°; β = 95,52°; γ = 102,65°.Beide Verbindungen sind miteinander isotyp; sie bilden Ionentripel, die durch je zwei kurze Na…F-Kontakte von 232 pm mit den vier axial angeordneten Fluorliganden der dimeren Anionen [WO2F3]22- bzw. [WSOF3]22- zustandekommen. Die Dimerisierung erfolgt über gewinkelte Fluorobrücken mit nur wenig verschieden langen W—F-Bindungen. Die Chalkogenoliganden befinden sich in den trans-Positionen zu den Brücken-F-Atomen.
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  • 10
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    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 606 (1991), S. 109-117 
    ISSN: 0044-2313
    Keywords: Pentachlorohenate(IV)-acetonitrile solvate ; synthesis ; IR spectrum ; 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 [Li(12-Crown-4)2][ReCl5(CH3CN)] · CH3CNThe title compound has been prepared by the reaction of lithium chloride with rhenium pentachloride in the presence of 12-crown-4 in acetonitrile solution.[Li(12-crown-4)2][ReCl5(CH3CN)] · CH3CN has been characterized by IR spectroscopy as well as by an X-ray structure determination. Space group P1, Z = 2, 4 450 observed unique reflections, R = 0.047, Lattice dimensions at 20°C: a = 1 445.8, b = 1 463.2, c = 1 580.2 pm, α = 89.28°, β = 114.19°, γ = 89.40°. The compound is ionic, the cation being formed by a lithium ion coordinated by the eight oxygen atoms of two crown ether molecules 12-crown-4 in sandwich fashion. In the anions [ReCl5(CH3CN)]- the rhenium atoms are in a distorted octahedral shape by the five chlorine atoms and by the N atom of the acetonitrile molecule. The two crystallographically independent cations and anions, respectively, are only slightly different.
    Notes: Die Titelverbindung wurde durch Reaktion von Lithiumchlorid mit Rheniumpentachlorid in Gegenwart von 12-Krone-4 in Acetonitrillösung hergestellt und durch ihr IR-Spektrum und durch eine röntgenographische Strukturanalyse charakterisiert.[Li(12-Krone-4)2][ReCl5(CH3CN)] · CH3CN kristallisiert triklin in der Raumgruppe P1 mit zwei Formeleinheiten pro Elementarzelle, 4 450 beobachtete unabhängige Reflexe, R = 4,7%. Gitterabmessungen bei 20°C: a = 1 445,8; b = 1 463,2; c = 1 580,2 pm; α = 89,28°; β = 114,19°; γ = 89,40°. Die Verbindung hat einen ionischen Aufbau, in dem die Lithiumionen sandwichartig von den acht Sauerstoffatomen zweier Kronenethermoleküle 12-Krone-4 koordiniert sind. In den Anionen [ReCl5(CH3CN)]- sind die Rheniumatome verzerrt oktaedrisch von den fünf Chloratomen und von dem N-Atom des Acetonitrilmoleküls umgeben. Die beiden kristallographisch unabhängigen Kationen bzw. Anionen unterscheiden sich nur wenig voneinander.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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