Mechanism in sulphonyl group transfer: effective charge in ground-, transition-, and product-states during base-catalysed hydrolysis of aryl sulphonate esters possessing associative (AE) and dissociative (EA) mechanisms

Abstract

Substituent effects on rate and equilibrium constants for transfer of sulphonyl species to phenols lead to measures of the change in effective charge on participating atoms in the transition-state of the rate-limiting step; results are obtained for both dissociative and associative sulphonyl group transfer mechanisms.