Internal nucleophilic displacements within silanolate ions. A new mechanism of substitution at silicon

Abstract
Unimolecular dissociation of O–(X)Si< species to give X and OSi(which immediately reacts with the solvent) is postulated to account for (a) features of the base-catalysed cleavage of R–Si bonds in solutions of RSiMe2OMe (R =m-ClC6H4CH2 or PhCC) in 5% H2O–MeOH and (b) the rapid conversion of (Me3Si)3CSiPh(OH)I into (Me3Si)3CSiPh(OH)(OMe) by methanolic MeONa.

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