Kinetic features of the oxidation of secondary alcohol by polymer - supported chromic acid

 

By Vilas Y. Sonawane and Nandini P. Hilage.

 

Abstract

The oxidation of secondary alcohol was investigated to compare the polymer substrate supported reagent with a commercially available cross-linked polymeric reagent. The reagent supported on anion exchange resin was found to be more efficient in the oxidation reaction. The reagent is very easily separated from the reaction mixture and can be manually removed from the reaction mixture, which remains clear during and after the reaction. The kinetics of oxidation of secondary alcohol with chromic acid supported on anion exchange resins like Duolite A-101[Cl-] and Ambersep 900[ OH ] in 1,4-dioxane has been studied. The reaction is found to be of zero order each in concentration of alcohol and oxidant. The stoichiometric coefficient of the reaction has been found to be 2:1. The oxidation products have been isolated and characterized by their derivatives, UV and FT-IR spectral studies. The effect of substituent’s on the rate of oxidation and activation parameters for the overall reactions has been computed from Arrhenius plot.

Keywords: kinetic, oxidation, secondary alcohol, polymer-supported, chromic acid.

 

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