The comparative study of oxidation of aliphatic alcohols likes methanol, ethanol and propanol was carried out by CAN in the presence of perchloric acid in acetonitrile medium. The reaction is first order with respect to [substract], [oxidant] and [H+] concentration. The kinetics of the reaction was followed spectrophotometrically at λmax = 400 nm. The reactions were studied at different temperature [303 to 323 K]. A possible mechanism is proposed here. The reaction constant involved in the mechanism have been computed. There is good agreement between the observed and calculated rate constant under different experimental conditions. The activation parameters have been evaluated.

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Oxidation of mandelic acid by Pyridinium dichromate was studied in the presence of perchloric acid in DMF-H2O medium at 40 ºC. The kinetics of the reaction was followed spectrophotometrically at λ max = 355 nm. The reaction is unit dependence on each of PDC, [H+] and [substrate]. Michaelis-Menten type kinetics was observed. The reactions were studied at different temperature [30, 35, 40, 45, 50 ºC] and activation parameters were computed.

The oxidation of serine catalysed by cerium(IV) has been studied in sulphuric acid medium at 318 K. The reaction follows rst order kinetics with respect to [Mn(II)] while negative effect was observed for the variation of [H+] on the rate of reaction. The reaction exhibits rst to zero order kinetics with respect to serine at its lower to higher concentrations. Under the experimental condition, the kinetically active species of cerium(IV) has been found to be Ce(SO4)2. Activation parameters has been calculated. The mechanism has been proposed from the results of kinetic studies, reaction stoichiometry and product analysis.

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