MECHANISTIC ASPECTS FOR THE OXIDATION OF BENZALDEHYDE BY PIPERIDINIUM CHLOROCHROMATE

Abstract

The kinetics of oxidation of benzaldehyde by piperidinium chlorochromate has been studied in the presence of perchloric acid in aqueous acetic acid medium. The main product of the oxidation is benzoic acid. The reaction order is one with respect to benzaldehyde, piperidinium chlorochromate and fractional order with respect to perchloric acid. The rate of reaction rises with increase in the percentage of acetic acid. The reaction does not track the polymerization with acrylonitrile. The rate of reaction decreases with variation in the concentration of manganous sulphate. The thermodynamic and activation parameters have been calculated using Eyring’s plot. From the obtained kinetic results, a plausible mechanism has been proposed and suitable rate law is derived.