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Tetrasila-1,3-butadiene and its transformation to disilenyl anions

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Silicon Chemistry

Abstract

The reaction of dilithiosilane, (tBu2MeSi)2SiLi2 (2), with 1,1,2,2-tetrachloro-1,2-dimesityldisilane produced the tetrasila-1,3-butadiene derivative, (tBu2MeSi)2Si=Si(Mes)–(Mes)Si=Si(SiMetBu2)2 (3, Mes = 2,4,6-trimethyl-phenyl), which was isolated as reddish-purple crystals. The structure of 3 was determined by both spectroscopic and crystallographic methods; the Si=Si double bond lengths are 2.2003(12) and 2.1983(12) Å, and the length of the central Si−Si single bond is 2.3376(11) Å. The tetrasilabutadiene moiety is highly twisted, the torsional angle of Si1=Si2−Si3=Si4 being 72°. The reaction of 3 with tBuLi or KC8 in THF gave the disilenyllithium 4 and disilenylpotassium 5, which contain an sp 2-type silyl anion, by the reductive cleavage of the central Si–Si bond in 3.

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Authors and Affiliations

  1. Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8571, Japan

    Masaaki Ichinohe, Kaori Sanuki, Shigeyoshi Inoue & Akira Sekiguchi

Authors
  1. Masaaki Ichinohe
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  2. Kaori Sanuki
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  3. Shigeyoshi Inoue
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  4. Akira Sekiguchi
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Corresponding author

Correspondence to Akira Sekiguchi.

Additional information

Dedicated to Professor Mitsuo Kiro on the occasion of his 2005 Wacker Award and in recognition of his outstanding contribution to silicon chemistry.

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Ichinohe, M., Sanuki, K., Inoue, S. et al. Tetrasila-1,3-butadiene and its transformation to disilenyl anions. Silicon Chem 3, 111–116 (2007). https://doi.org/10.1007/s11201-006-9011-x

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  • DOI: https://doi.org/10.1007/s11201-006-9011-x

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