Kinetics of oxidation of m-Toluidine by Potassium Dichromate in Absence and Presence of CTAB

Ritu Singh

Abstract: The Oxidation of m-toluidine by Potassium dichromate has been studied both spectrophotometrically (640nm) and iodometrically in aqueous nitric acid medium in absence and presence of micelle (CTAB). The reaction is said to follow consecutive reaction mechanism. The reaction shows substrate inhibition at low H+ concentration. Oxidation proceeds by two routes and both routes give the colored product. Kinetic parameters are calculated in absence of surfactant but could not be calculated in presence of surfactant because absorbance after showing maxima showed marginal dip indicating decomposition of colored product. Reaction is retarded in presence of micelle. Suitable mechanism is proposed. The rate constants, equilibrium constants and kinetic parameters are calculated.

Keywords: Kinetics, Oxidation, Catalyst, m-toluidine, Micelle