Kinetics of Oxidation Toluidines by Chromic Acid

Abstract

The kinetics of oxidation of o, m and p-toluidines by chromicacid has been studied in acetic acid-water medium. The reactionswere found to be fIrst order with respect to [Oxidant],  [Substrate]and [H⁺]. An addition of Cu²⁺ and Ag ⁺ increases the rate of reactionwhile addition of Mn²⁺ decreases the rate of reaction in each case.An addition of neutral salts like NaCl, KCl, Na₂SO₄ and K₂SO₄ inthe reaction mixture showed negligible effect. Effects of dielectricconstant and temperature on the reactions were studied. Thermodynamicparameters have been evaluated and mechanism for thereactions have been proposed. The isokinetic temperature has alsobeen evaluated.