Kinetics and mechanism of oxidation of vanillin by Cerium(IV) in aqueous perchlorate medium

The oxidation reaction of vanillin with cerium (IV) in perchloric acid medium has been studied spectrophotometrically over the range 5.0 � 10 3 [Vanillin]T � 25.0; 0.3 � [H + ]T � 0.8; I = 1.0 mol dm -3 (NaClO4) and 293 � T � 308K. The rate of the reaction has been found to increase with the increase in [H + ]T and [Vanillin]T. The reaction follows first order kinetics with respect to each [Ce(IV)]T, [Vanillin]T and fractional order with respect to [H + ]T. The reaction proceeds in two paths and