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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 1277-1283 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Lithio-hexamethylcyclotrisilazane with Silicon-Fluoro Compounds1-Mono- and 1,3-dilithio-2,2,4,4,6,6-hexamethylcyclotrisilazane (2, 9) react with silicon tetrafluoride or difluorodiorganylsilanes RR′SiF2 (R = F, H, CH3, C6H5 R′ = CH3, C6H5) under LiF-elimination to give the cyclotrisilazanes 3-8, 10, and 11. The di- and trisubstituted compounds 12-14 are obtained by the reaction of 2 with CH3HSiF2 and CH3SiF3 in a molar ratio of 1:1. Ring coupling by a silicon bridge is achieved by the reaction of SiF-substituted cyclotrisilazanes with lithium tert-butylamide (15), or by the reaction of these compounds with two moles of a lithiocyclotrisilazane (16). The mass, 1H-, and 19F n.m.r. spectra of the compounds are reported.
    Notes: Mono- und dilithiiertes 2,2,4,4,6,6-Hexamethylcyclotrisilazan (2, 9) reagieren mit Siliciumtetra-fluorid oder mit Difluordiorganylsilanen des Typs RR′SiF2 (R = F, H, CH3, C6H5; R′ = CH3, C6H5) unter LiF-Abspaltung zu den Cyclotrisilazanen 3-8, 10 und 11. Die di- und trisubstituierten Verbindungen 12-14 sind in der Reaktion von 2 mit CH3HSiF2 sowie CH3SiF3 im Molverhältnis 1:1 erhältlich. Ringverknüpfungen über eine Siliciumbrücke gelingen durch Umsetzung der SiF-substituierten Cyclotrisilazane mit Lithium-tert-butylamid (15) sowie durch Umsetzung dieser Verbindungen mit einem weiteren mol eines lithiierten Cyclotrisilazanes (16). Die Massen-, 1H- und 19F-NMR-Spektren dieser Verbindungen werden mitgeteilt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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