α,ω-Oligosilyl Dianions and Their Application in the Synthesis of Homo- and Heterocyclosilanes
Organometallics2003Vol. 22(18), pp. 3723–3731
Citations Over TimeTop 10% of 2003 papers
Roland C. Fischer, Dieter Frank, Walter Gaderbauer, Christian Kayser, C. Mechtler, Judith Baumgartner, Christoph Marschner
Abstract
The reactions of bridged tris(trimethylsilyl)silyl fragments with 2 molar equiv of potassium tert-butoxide allow the generation of α,ω-oligosilyl dianions (1a, 2a, 3a, 4a). Depending on the nature of the spacer between the oligosilyl units, these compounds can be used to generate either linear or cyclic derivatives. They are especially attractive for the formation of homo- and heterocyclosilanes, as exemplified by the synthesis of sila-, stanna-, and zirconocenacyclosilanes. A linear bis(potassiumsilyl)acetylene (4a) was used to bridge two zirconocene units, (Cp2Zr(Cl)Si(SiMe3)2CCSi(SiMe3)2Zr(Cl)Cp2) (11).
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