Un-catalyzed and iridium(III) catalyzed oxidation of p-methoxy benzaldehyde by cerium(IV)

Rate of separately studied un-catalyzed oxidation of anisaldehyde by CeIV was calculated by the intercept of catalyst graph of IrIII catalyzed reaction. Order in oxidant was different in two conditions. It was found that anisic acid was the product of oxidation and CeIV is not reduced before the slow step. Rate law for catalyzed oxidation is given as