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  • Inorganic Chemistry  (3)
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  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ionic Structures of 4- and 5-coordinated Silicon. Novel Ionic Crystal Structures of 4- and 5-coordinated Silicon: [Me3Si(NMI)]+ Cl-, [Me2HSi(NMI)2]+ Cl-, [Me2Si(NMI)3]2+ 2 Cl-. NMIMe3SiCl forms with N-Methylimidazole (NMI) a crystalline 1:1-compound which is stable at room temperature. The X-ray single crystal investigation proves the ionic structure [Me3Si(NMI)]+Cl- 1 which is the result of the cleavage of the Si—Cl bond and the addition of an NMI-ring. The reaction of Me2HSiCl with NMI (in the molar ratio of 1:2), under cleavage of the Si—Cl bond and co-ordination of two NMI rings, yields the compound [Me2HSi(NMI)2]+Cl- 2. The analogous reaction of Me2SiCl2 with NMI (molar ratio 2:1) leads to a compound which consists of Me2SiCl2 and NMI in the molar ratio of 1:2. During the sublimation single crystals of the compound [Me2Si(NMI)3]2+ 2 Cl-. NMI 3 are formed.
    Notes: Me3SiCl bildet mit N-Methylimidazol (NMI) eine bei Raumtemperatur beständige, kristalline 1:1 Verbindung. Nach der Röntgenstrukturanalyse entsteht unter Spaltung der Si—Cl-Bindung und Anlagerung eines NMI-Rings eine Verbindung ionischer Struktur [Me3Si(NMI)]+Cl- 1. Die Reaktion von Me2HSiCl mit NMI (Molverhältnis 1:2) führt unter Spaltung der Si—Cl-Bindung und Koordination von zwei NMI-Ringen zur Verbindung [Me2HSi(NMI)2]+Cl- 2. Bei der analogen Umsetzung von Me2SiCl2 mit NMI (Molverhältnis 2:1) entsteht eine Verbindung, die Me2SiCl2 und NMI im Molverhältnis 1:2 enthält. Bei der Sublimation werden Einkristalle der Verbindung [Me2Si(NMI)3]2+ 2 Cl-· NMI 3 erhalten.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 564 (1988), S. 96-100 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structure of Tris(pyridinium)bromine-bis(bromotrichloraluminate(III))The compound [(PyH)3Br] [AlCl3Br]2 is formed by melting stoichiometric amounts of PyHBr and AlCl3 in the ratio of 3:2. It crystallizes in the space group P21 with lattice constants a= 745.6(2), b = 1415.6(2), c = 1363.1(1) pm, β = 93.00(1)°, Z = 2. The atomic parameters were refined from 2827 measured intensities to a weighted value of R = 5.8%. The cation consists of three pyridinium ions with N—H—Br-hydrogenbonds to a central positioned bromide ion. The N—Br-distances are 334(2), 330(2) and 323(3) pm.
    Notes: Die Verbindung [(PyH)3Br] [AlCl3Br]2 kann durch Zusammenschmelzen stöchiometrischer Mengen PyHBr und AlCl3 im molaren Verhältnis 3:2 erhalten werden. Sie kristallisiert in der Raumgruppe P21 (monoklin) mit den Gitterkonstanten a= 745,6(2), b = 1415,6(2), c = 1363,1(1) pm, β = 93,00(1)°, Z = 2. Zur Strukturbestimmung wurden 2827 Reflexintensitäten gemessen; es wurde ein gewichteter R-Wert von 5,8% erreicht. Das Kation dieser Verbindung besteht aus einem von drei Pyridinium-Ionen über N—H—Br-Wasserstoffbrücken koordinierte zentralen Bromid-Ion. Die N—Br-Abstände betragen 334(2), 330(2) und 323(3) pm.
    Additional Material: 4 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 564 (1988), S. 101-103 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structure of N,N′-Bis(trimethylsilyl)-imidazoliumiodide [(Me3Si)2(C3H3N2)]+I-Me3SiI forms with N-Trimethylsiylimidazole (NTMSI) a 1:1 compound which is stable at room temperature. Single crystals can be isolated from a solution of chloroform. The X-ray crystal structure investigation proves an ionic structure.
    Notes: Me3SiI bildet mit N-Trimethylsilylimidazol (NTMSI) eine bei Raumtemperatur beständige 1:1-Verbindung. Aus einer Lösung in Chloroform lassen sich Einkristalle isolieren. Die Röntgenstrukturanalyse beweist eine ionische Struktur.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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