An Isolable Boryl-substituted Disilene from the Reaction of an sp2-type Silyl Anion with Haloboranes: Synthesis and Characterization

Shigeyoshi Inoue, Masaaki Ichinohe, Akira Sekiguchi

doi:10.1246/cl.2008.1044

An Isolable Boryl-substituted Disilene from the Reaction of an sp2-type Silyl Anion with Haloboranes: Synthesis and Characterization

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Shigeyoshi Inoue

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba
Masaaki Ichinohe

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba
Akira Sekiguchi

Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba

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<jats:title>Abstract</jats:title> <jats:p>The disilenyllithium, (t-Bu2MeSi)2Si=Si(SiMet-Bu2)Li (2a), reacted with B-chloropinacolborane (pin)BCl, or B-chlorocatecholborane (cat)BCl in toluene to produce the corresponding boryl-substituted disilenes 3a and 3b, which were isolated as air-sensitive yellow crystals. X-ray crystallographic analysis of 3b showed a nearly planar geometry around the Si=Si bond lacking π-conjugation between the Si=Si bond and a vacant p orbital of boron.</jats:p>