Kinetic of iodination of phenol and substituted phenols by pyridinium iodochloride in methanol

Abstract

The kinetics of iodination of the phenol and substituted phenols using pyridinium<br />iodochloride in methanol has been studied under varying conditions. The rates show first order<br />kinetics each in pyridinium iodochloride and phenols. The rates of reactions are measured at<br />different temperature and activation parameters for all phenols computed. Hammett plot is found<br />to be valid and the corrletion between the enthalpies and free energies of activations is<br />reasonably linear with an isokinetic temperature 359.55 K. Similarly log A values of all the<br />phenols are optimized corresponding to Ea of phenols through the equation, log A = log kobs + Ea<br />/ 2.303 RT.