Cyclization and Isomerization Reactionsin Silylhydrazine Chemistry |
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| Authors: | Uwe Klingebiel Stefan Schmatz Eike Gellermann Christian Drost Mathias Noltemeyer |
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| Institution: | Institut für Anorganische Chemie der Universit?t G?ttingen, D-37077 G?ttingen, Germany, DE
Institut für Physikalische Chemie der Universit?t G?ttingen, D-37077 G?ttingen, Germany, DE
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| Abstract: | Summary. This review describes the synthesis and isomerization reactions of cyclic silylhydrazines. Topics of discussion are the ring
expansion of the three-membered Si(SiN2) to the four-membered (SiN)2 ring by lithiation of the (SiN2) ring and by thermal silyl group insertion into the N*N bond, the ring expansion of a three-membered (SiN2) to a five-membered (CSi2N2) ring by SiCH2 insertion into the Si*N bond, the formation of isomeric four- and six-membered (SiN2)2 rings, the synthesis of five- and six-membered silylhydrazine rings, and the expansion of a five-membered (N2Si2N)N ring to the isomeric six-membered (SiNN)2 ring. The mechanisms of the isomerizations are explained by quantum chemical calculations, and the results are verified by
crystal structure determinations.
Received February 23, 2001. Accepted (revised) April 24, 2001 |
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| Keywords: | , ,Silylhydrazine, Rings, Isomerization, Expansion, Calculations, |
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