Electrophilic substitution at a saturated carbon atom VI. Determination of the polarity “X” of dimethyl sulfoxide and acetonitrile by the kinetic study of iododemetallation of tetraalkyltin and -lead compounds

The very similar sensitivity of the iododemetallation of tetraalkyltins and -leads to solvent effects suggests close similarity between the mechanisms of cleavage of CSn and CPb bonds; bond-breaking seems to be the rate-determining factor. The importance of nucleophilic assistance in this type of reactions is...