Phosphine-Catalyzed Si−C Coupling of Bissilylmethanes: Preparation of Cyclic (Cl<sub>2</sub>SiCH<sub>2</sub>)<sub>2</sub> and Linear Cl<sub>2</sub>Si(CH<sub>2</sub>SiCl<sub>3</sub>)<sub>2</sub> via Silylene and Silene Intermediates
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Cyclic and linear carbosilanes, (Cl2SiCH2)2 (2) and Cl2Si(CH2SiCl3)2 (3), were produced from phosphine-catalized Si−C coupling reactions of bissilylmethanes, HCl2SiCH2SiX1X2Cl (X1, X2 = Cl (1), X1 = H, X2 = Cl (7), and X1 = Me, X2 = Cl (8)). The formation of compounds 2 and 3 suggested competing reaction pathways, involving dichlorosilene [CH2SiCl2] and dichlorosilylene [:SiCl2] intermediates. Each intermediate was either proposed by the product isolation of the trimerized product (3) or confirmed by trapping experiments with 2,3-dimethylbutadiene and methylene chloride.
创建时间：
2010-02-08
