Convolutive voltammetric studies on some N-benzylsulfonyl-3,5-dimethyl-4-arylazopyrazole and some of its derivatives at a mercury cathode

The reduction of some N-benzylsulfonyl-3,5-dimethyl-4-arylazopyrazoles and some of its derivatives (p-Br, P-N(CH3)(2)) has been studied using polarogr aphy, cyclic voltammetry, chronocoulometry and chronopotentiometry techniqu es in 40% ethanolic B.R. buffer series (pH 2.5-11.1) at a mercury cathode. Two electrons are consumed in the electroreduction of N=N center confirmed by controlled potential coulometry experiment. The chemical and electrochem ical parameters have been tested by com paring the experimental voltammogra ms with simulated data. Convolutive cyclic voltammetry indicates that the e lectrochemical reaction mechanism proceeds via ECirrev process.