The disilanol (CMe3)2Si(OH)2 (1) serves as a starting material in the reaction with C4H9Li and sodium for the construction of the alkali derivatives 2,3,4, and the siloxanes 5,6,7,8. The six-membered cyclosiloxane 10 and the spirocyclic compound 11 are easily prepared in the reaction of [(Me3C)2Si(OH)]2O (8) with 2C4H9Li and SiF4 or SnBr4. The crystal structures of (Me3C)2Si(OLi)2 (3), (Me3C)2Si(ONa)OH (4), and (Me3C)2Si(ONa)OSiF(Me3C)2 (9) have been determined and are discussed.
Die Lithiumverbindungen der Aminofluorsilane (1–7) reagieren mit MHal4 (M = Si, Ge, Sn; Hal = Cl, Br) zu Verbindungen des Typs
(8–10, 12, 14: M = Si, 13, 15, 16: M = Ge, 17: M = Sn). Unter intermolekularem Halogenaustausch werden 11, 12 und 14 erhalten, R2SiHal
SiHal2F (11, 12: Hal = Cl, 14: Hal = Br). Der Halogenaustausch ist substituentenabhängig und wird nur an halogenierten Disilazanen mit den Substituenten R = Alkyl und Aryl beobachtet. Von 8 und 12 wurde eine Kristallstrukturanalyse durchgeführt.
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