Kinetics and Mechanism of the Oxidation of Diphenyl Sulphides by Bis-pyridinesilver(I) Dichromate

Abstract

The kinetics of oxidation of diphenyl sulphide (DPS) by bis-pyridinesilver( I) dichromate (BPSDC) have been studied in 70 % aqueous acetic acid medium. The reaction is first order with respect to [oxidant] and fractional order with respect to [substrate]. The reaction has been found to be catalyzed by H⁺ ions. Decrease the dielectric constant of the medium increases the rate. Activation parameters have been evaluated from the Eyring's plot. The stoichiometric studies reveal that the reactants react in 1:1 mole ratio via the formation of a complex. Mechanism consistent with the observed kinetics results has been proposed and the related rate law was derived.