Dalton communications. Effect of amine substituents and neutral leaving groups on the activation volume for aquation of octahedral pentaamine complexes of CrIII and RhIII
Abstract
The activation volumes were obtained for the aquation reactions of [M(RNH2)5L]3+(M = Cr, R = Me, L = Me2SO, HCONMe2 or MeCONMe2; M = Rh, R = H or Me, L = Me2SO or HCONMe2); they are in accord with the existence of a dissociative shift in the substitution mechanism, not only with the size of the substituent R, but also with the size of the leaving ligands L.