Aquation of neutral ligands from penta-ammine-cobalt(III) and -chromium(III) ions: mechanistic differentiation
Abstract
Volumes of activation for the aquation of a series of Cr(NH3)5L3+ ions are all negative with an average value of ca.-6 cm3 mol–1, contrasting with an average positive value of ca.+2 cm3 mol–1 for the Cobalt(III) analogues, and supporting disparate associative (Ia) and dissociative (Id) mechanisms, respectively.