Kinetics of Oxidation of Rosaniline Hydrochloride by Potassium Peroxydisulphate in Mixed Micelles of Binary Surfactant System

Abstract

The kinetics of oxidation of rosaniline hydrochloride (R–HCl) has been studied in binary combinations of cationic/nonionic and anionic/nonionic surfactant systems at 30ºC. The pre-micellar environment of single C₁₆TABr catalyses the reactions whereas single sodium dodecyl sulphate (SDS) and nonionic surfactants, viz., Triton X-100, Triton X-102, Tween-20 lind Tween-80 strongly inhibit the reaction rate of R–HCl. The values of rate constant in mixed micellar solutions (C₁₆TABr + Tween-20, C₁₆TABr + Tween-80) are less than the single cationic surfactant but are higher than the single nonionic surfactant; while the value of rate constant in mixed micellar solutions (SDS + Triton X-100, SDS + Triton X-102) is less than that in single anionic as well as in nonionic surfactant.