Evidence for a D-mechanism in the substitution of methanol by pyridyl ligands in cobalt(III)(protoporphyrin IX dimethyl ester)(methanollo)(methoxo) complex in methanol
Abstract
The substitution of MeOH in CoIII(protoporphyrin IX dimethyl ester)(MeO)(MeOH) by pyridine (py), 4Me-py, or 4CN-py in methanol is a D-type process with a limiting rate of 57.8 s–1 for all three ligands at 25 °C; the subsequent substitution of MeO– proceeds via the complex conjugate acid, also in a dissociative manner.