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Disilenyllithium from Tetrasila-1,3-butadiene:  A Silicon Analogue of a Vinyllithium

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Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
Cite this: Organometallics 2004, 23, 13, 3088–3090
Publication Date (Web):May 20, 2004
https://doi.org/10.1021/om040056s
Copyright © 2004 American Chemical Society
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Abstract

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The reaction of dilithiosilane, (tBu2MeSi)2SiLi2 (2), with 1,1,2,2-tetrachloro-1,2-dimesityldisilane produced the tetrasila-1,3-butadiene derivative (tBu2MeSi)2SiSi(Mes)(Mes)SiSi(SiMetBu2)2 (3; Mes = 2,4,6-trimethylphenyl) as reddish purple crystals. The reaction of 3 with tBuLi in THF produced 1,1-bis(di-tert-butylmethylsilyl)-2-lithio-2-mesityldisilene (4) as red crystals, which is an sp2-type silyllithium species, by the reductive cleavage of the central Si−Si bond in 3.

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Tables giving the details of the X-ray structure determination, thermal ellipsoid plots, fractional atomic coordinates, anisotropic thermal parameters, bond lengths, and bond angles for 3 and 4. This material is available free of charge via the Internet at http://pubs.acs.org.

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