Kinetics and Mechanism of Meso-Tetraphenylporphyriniron(iii) Chloride (Tpp) Catalysed Oxidation of Indole by Magnesiummono Peroxyphthalate

Abstract

ABSTRACT:Mechanistic study on meso-tetraphenylporphyriniron(III) chloride (TPP) catalysed oxidation of indole by magnesiummonoperoxyphthalate in aqueous acetonitrile medium have been carried out. The reaction follows a fractional order with respect to substrate and catalyst. The order with respect to oxidant was found to be one. Increase in percentage of acetonitrile and increase in the concentration of [H + ] decreased the rate.The reaction fails to initiate polymerization, and a radical mechanism is ruled out. Activation and thermodynamic parameters have been computed. A suitable kinetic scheme based on these observations is proposed. Significant catalytic activity is observed for the reaction system in the presence of TPP.