In the previous post, I explored the mechanism for nucleophilic substitution at a silicon centre proceeding via retention of configuration involving a Berry-like pseudorotation. Here I probe an alternative route involving inversion of configuration at the Si centre. Both stereochemical modes are known to occur, depending on the leaving group, solvent and other factors.[cite]10.1016/S0040-4020(01)89077-3[/cite],[cite]10.1021/ja01006a024[/cite],[cite]10.1021/ja00784a081[/cite]