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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 112-116 
    ISSN: 0044-2313
    Keywords: Bis(trimethylsilyl)-, bis(trimethylgermyl)carbodiimide ; substitution compounds ; chloro- and dimethylmetal(III) derivatives ; syntheses ; vibrational spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Substitution Reactions of Bis(trimethylelement)carbodiimides of Silicon and Germanium with Metal Chlorides and Dimethylmetalchlorides of Sb, Al, Ga, and InThe reaction of Me3Ge—N=C=N—GeMe3 (Me=CH3) with SbCl5 in a 1 : 1 molar ratio forms dimeric Cl4SbNCNGeMe3 in high yields. The corresponding compounds (X2MNCNSiMe3)2-3 (with X=Cl, Me and M = Al, Ga), formed by reactions of X2MCl and Me3SiNCNSiMe3, are less stable and tend to condensations, eliminating Me3SiX. The carbodiimide derivates (Me2MNCNEMe3)2-3 (with E = Si, Ge) are also available in aprotic solvents from polymeric LiNCNEMe3 and Me2MCl (M = Al, Ga, In). According to the IR and Raman spectra the low associated substitution products consists of cyclic ring skeletons and asymmetric 〉 N—C≡N—EMe3 units with cyanamide conformation.
    Notes: Bei der Reaktion von Me3Ge—N=C=N—GeMe3 (Me=CH3) mit SbCl5 im Molverhältnis 1 : 1 entsteht in hoher Ausbeute dimeres Cl4SbNCNGeMe3. Die entsprechend aus X2MCl und Me3SiNCNSiMe3 dargestellten Verbindungen (X2MNCNSiMe3)2-3 (mit X = Cl, Me und M = Al, Ga) sind weniger beständig und neigen zu Kondensationen unter Abspaltung von Me3SiX. Carbodiimidderivate der Form (Me2MNCNEMe3)2-3 (mit E = Si, Ge) sind auch aus polymerem LiNCNEMe3 und Me2MCl (M = Al, Ga, In) in aprotischen Lösungsmitteln zugänglich. Die IR- und Ramanspektren der Verbindungen werden aufgenommen und diskutiert, danach weisen die niedrig assoziierten Produkte ein cyclisches Ringgerüst und unsymmetrische 〉N—C≡N—EMe3 Einheiten mit Cyanamidkonformation auf.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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