DMAP-stabilized bis(silyl)silylenes as versatile synthons for organosilicon compounds
Richard Holzner1, Dominik Reiter1, Philipp Frisch1
1Department of Chemistry, WACKER-Institute of Silicon Chemistry and Catalysis Research Center Lichtenbergstraße 4 85748 Garching bei München Germany s.inoue@tum.de.
Abstract:
DMAP-stabilized silylenes 1a-c are obtained from the reductive debromination of the corresponding dibromosilanes in the presence of DMAP. Their distinctly different thermal isomerization reactions via C-H bond activation, dearomative ring expansion and silyl migration are discussed. Furthermore, complexes 1 dissociate at elevated temperatures, providing the corresponding free silylenes in situ, which are even capable of single-site activation of H2. Additionally, a potassium-substituted silicon-centered radical 2 is isolated from overreduction of ( Bu3Si)2SiBr2.
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