Kinetic and Mechanistic Studies on the Oxidation of Benzaldehyde with Piperazinium Dichromate in Aqueous Acetic Acid Solution

Abstract

This paper contains the results obtained in the detailed kinetic investigations on the oxidation of benzaldehyde by piperazinium dichromate (PZD) in 50 % aqueous acetic acid (v/v) solution. The order in substrate, order in oxidant are established by integral and differential methods. The influence of [HClO₄], temperature and addition of neutral salt on the kinetics of this reaction are studied. The activation parameters (ΔH^#, ΔS^# and ΔG^#) are determined accurately for this reaction from the effect of temperature on the rate constant. On the basis of kinetic evidence and product analysis, a suitable mechanism has been proposed.