%0 Journal Article
%T Oxidation of Lactic Acid by Manganese(III) in Sulfuric Acid Medium: Kinetics and Mechanism
%J American Journal of Organic Chemistry
%@ 2163-1301
%D 2012
%I 
%R 10.5923/j.ajoc.20120203.04
%X The kinetics of oxidation of lactic acid (LA) by manganese(III) in sulfuric acid solutions at 293 K has been studied. A solution of the mild oxidant, Mn(III) sulfate, in aqueous sulfuric acid medium was prepared by a standard electrochemical method. The oxidation reaction was monitored by spectrophotometry at a fixed wavelength (¦Ëmax = 491 nm), varied temperature, and varied solution conditions. The Mn(III)-LA reaction stoichiometry of 4:1 was determined and the products were characterized. The experimental rate law is: rate = kobs [Mn(III)][LA]x[H+]y, where x, and y are fractional orders. The effects of varying ionic strength, solvent composition (dielectric constant), acid, and the reduction product, Mn(II), on the rate of the reaction were investigated. Activation parameters evaluated using Arrhenius and Eyring plots suggest the occurrence of an entropy controlled reaction. A mechanism consistent with the observed kinetic data has been proposed. A rate law has been derived based on the mechanism.
%K Kinetics
%K Oxidation
%K Lactic Acid
%K Manganese(III)
%K Mechanism
%K Rate Law
%U http://article.sapub.org/10.5923.j.ajoc.20120203.04.html