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Synlett 1995; 1995(9): 880-890
DOI: 10.1055/s-1995-5111
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Synthesis and Structure of Polysilacyclic Alkynes and Allenes

F. Hojo, W. Ando*
  • *Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305, Japan, Tel & Fax 81 298 53 4214; e-mail wando@sakura.cc.tsukuba.ac.jp
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Publication Date:
31 December 2000 (online)

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Six membered cyclic polysilaacetylenes were prepared by direct reaction of 1,4-dichlorotetrasilane with acetylene di-Grignard reagents. The reaction of cyclic polysilaacetylenes was studied. Similarly, several different types of cyclic polysilaallenes were prepared by direct reaction of dihalopolysilanes with either allene dianions and tetraanions. The longer bond lengths of Si-Si than that of C-C bond makes possible to synthesize highly strained unsaturated cyclic compounds, which had been unable to isolate. Herein, synthesis and structure of polysilacyclic alkynes, allenes, bisallenes, and betweenallene are discussed.

Polysilane - Cyclicallene - Cyclicalkyne - Bicyclo[n.1.0]alkene