Dalton communications. Effect of amine substituents and neutral leaving groups on the activation volume for aquation of octahedral pentaamine complexes of Cr^IIIand Rh^III

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.