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