Studies on the Kinetics of Benzyltrimethylammonium Fluorochromate Oxidation of Substituted Benzaldehydes in Aqueous Acetic Acid Medium

ABSTRACT: The kinetics of oxidation of benzaldehyde (BA) by Benzyltrimethyl ammonium fluorochromate (BTMAFC) in protic solvent system has been studied at 303K. A unit order dependence of the reaction with respect to [BTMAFC], [BA] and [H+] ions has been observed. The reaction has been found to be catalysed by H+ ions. To study the effect of structure reactivity relationships, some para-substituted benzaldehydes were subjected to oxidation by BTMAFC at four different temperatures and thermodynamic parameters were calculated. The Exner plot showed that all the para-substituted benzaldehydes are oxidized by the same mechanism. The Hammett plot is linear with positive ρ values. The products of the oxidation are the corresponding acids. From the observed kineic results a suitable mechanism has been proposed