RAPID KINETICS OF CHLORINATION OF p–ACETOTOLUIDIDE IN AQUEOUS MEDIUM USING ROTATING PLATINUM ELECTRODE.

ROHOKALE G. Y.; PATHARE S.A.; ROHOKALE P.G.; ABHANG A.R.

Volume : V, Issue : I, January - 2016

RAPID KINETICS OF CHLORINATION OF p–ACETOTOLUIDIDE IN AQUEOUS MEDIUM USING ROTATING PLATINUM ELECTRODE.

Rohokale G. Y. , Pathare S. A. , Rohokale P. G. , Abhang A. R.

Abstract :

The rapid kinetics of the chlorination of p–acetotoluidide in aqueous medium by molecular chlorine at 7 pH has been studied using the rotating platinum electrode RPE. The specific reaction rate, energy of activation Ea, Entropy of Activation and the pre–exponential factor A, are evaluated. The reaction was found to be rapid and of the second order with a half life 16.3 s at 24.7�C. The rapidity of the reaction necessitated a special technique RPE to measure the unreacted chlorine which is the only electro reducible species in the reaction. The result obtained have been compared with those reported earlier for the omination of acetanilide, o– acetotoluidide, m–acetotoluidide and p–acetotoluidide under identical conditions. Thus the present work provides the quantitative verification of the relative nucleophilicity of substrates using kinetics as an investigational tool.