In the title reactions, unrearranged products (Me3Si)3C[Si(CD3)2Y] usually predominate over their rearranged isomers (Me3Si)2C[Si(CD3)2Me](SiMe2Y), revealing the inadequacy of the simplest mechanistic picture in which the two bridged silicon centres in a methyl-bridged cationic intermediate are equally available for attachment of a nucleophile.
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Journal of the Chemical Society, Chemical Communications
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