Si-and C-Chlorinated Carbosilanes

Corresponding reactions with MeLi led to the same compounds, but in very different yields  

The reaction of (Cl3Si)2CCl2 with MeLi is now clearly understood. It begins with the methylation of the CCl group 

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As the results of the previous section show. Si- and C-chlorinated carbosilanes initiate their reactions with MeMgCl by attack on a CCl group. In Si-fluorinated, C-chlorinat-ed carbosilanes however, the overall reaction path is governed by the reactivity of the SiF group. Hence, (F3Si)2CCl2 reacts with MeLi to methylate the silicon. 

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