Abstract

The products obtained from the vacuum flow pyrolysis of (Me3Si)2GeHMe in the presence of excess 2,3-dimethylbutadiene point to the generation of the alpha-silylgermylene Me3Si-Ge-Me, and to its rearrangement via intramolecular C-H insertion to form a silagermirane whose ring-opening leads to isomeric beta-silylgermylenes. Dimerization of Me3Si-Ge-Me to a digermene followed by a sequence of rearrangements is also indicated. Fragmentation of silagermirane intermediates to a heteroene and a divalent species is an important process under these conditions. No products were found that demand the rearrangement of Me3Si-Ge-Me to Me2Si=GeMe2 via a methyl shift. © 1997 Elsevier Science Ltd.

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