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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 2342-2347 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Novel 1,3,5,7-Tetraaza-2,4,6,8-tetrasilabicyclo[4.2.0]octaneThe reaction of mono- and dilithio-2,2,4,4,6,6-hexamethylcyclotrisilazane (1, 2) with aminofluorosilanes R—SiF2—NR′SiMe3 (R=F, Me; R′=CMe3, SiMe3) leads to LiF elimination and formation of the cyclotrisilazanes 3-5. The cyclodisilazane 6 is obtained by ring contraction in the reaction of compound 5 with butyllithium and F3SiN(CMe3)(SiMe3). The lithium salt of 5 forms the novel title compound 7 by an intramolecular reaction with LiF- elimination, silyl group and methanide ion migration. Another bicyclic compound 8 is obtained in the reaction of 2 with C4H9Li and F2SiMeN(SiMe3)2. The reaction mechanism is discussed.
    Notes: Mono- und dilithiiertes 2,2,4,4,6,6-Hexamethylcyclotrisilazan (1, 2) reagieren mit Aminofluorsilanen des Typs R—SiF2—NR′SiMe3 (R=F, Me; R′=CMe3, SiMe3) unter LiF-Abspaltung zu den Cyclotrisilazanen 3-5.5 reagiert mit Butyllithium und F3SiN(CMe3)(SiMe3) unter Ringkontraktion zum Cyclodisilazan 6. Intramolekular bildet das Lithiumsalz von 5 unter LiF-Abspaltung, Silylgruppen- und Methanid-Ionen-Wanderung die neuartige Titelverbindung 7. Ein weiterer Bicyclus (8) entsteht bei der Umsetzung von 2 mit C4H9Li und Me—SiF2—N(SiMe3)2. Der Bildungsmechanismus wird diskutiert.
    Type of Medium: Electronic Resource
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