OXIDATION KINETICS OF ANILINE BY ZINC DICHROMATE

Abstract

The kinetics of oxidation of aniline by Zinc Dichromate (ZDC) has been studied in 50% acetic acid-water medium. The reaction shows unit order dependence each with respect to oxidant and substrate. The rate of reaction increases with increase in the [H+]. The rate of oxidation increases with decrease in dielectric constant of solvent suggests ion-dipole interaction. Increase in ionic strength by the addition of sodium perchlorate has no effect on the rate constant. There is no polymerization with acrylonitrile and absence of free radical is proved. The rate of the reaction has been conducted at four different temperatures. Thermodynamic parameters have been calculated. Based on the kinetics results, a suitable mechanism has been proposed.