A New Approach to the Synthesis of Unsymmetrical Disilenes and Germasilene: Unusual 29Si NMR Chemical Shifts and Regiospecific Methanol Addition
Organometallics2001Vol. 20(20), pp. 4141–4143
Citations Over TimeTop 10% of 2001 papers
Abstract
The reaction of dilithiosilanes (iPr3Si)2SiLi2 (1a) and (tBu2MeSi)2SiLi2 (1b) with diaryldichlorosilanes [Ar2SiCl2, Ar = Mes (2,4,6-trimethylphenyl) and Tip (2,4,6-triisopropylphenyl)] quantitatively produced the corresponding unsymmetrical 1,1-diaryl-2,2-bis(trialkylsilyl)disilenes, Ar2SiSi(SiR3)2 (2, R3Si = iPr3Si; 3, R3Si = tBu2MeSi). A stable germasilene, Mes2GeSi(SiMetBu2)2 (4), was also synthesized by the reaction of 1b with dimesityldichlorogermane. These compounds reveal unusual 29Si NMR shifts and regioselective methanol additions.
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