
The kinetic studies of oxidation of 3-methylindole (3-MI) by Peroxodisulphate (PDS) has been carried out in ethanol medium. A total second order, first order first order each with respect to [3-MI] and [PDS] has been observed. The reaction was unaffected by increase of [H+]. Increase of percentage of ethanol decreases the rate. Variation of ionic strength had no influence on the rate. Activation and thermodynamic parameters have been calculated from kinetic values. A suitable mechanism scheme based on these observations is proposed.