KINETICS OF OXIDATION OF CYSTEINE BY CHLORAMINE-B IN SULFURIC ACID MEDIUM

The kinetics of oxidation of cysteine by sodium n-chlorobenzene sulphonamide (chloramine-b or cab)in h2so4 medium has been carried out at 30c. the reaction rate shows a first order dependence each on[cab] and [cysteine] and inverse fractional order on [h+]. the effect of [so42-], variation of ionic strength, dielectric constant of the medium and addition of the reduction product benzenesulphonamide have no effect on the rate of reaction .thermodynamic parameters have been evaluated by studying the kinetics at various temperature. suitable mechanism has been proposed in consistency with the kinetic results