Kinetics and Mechanism of Oxidation of L-Arabinose by Vanadium(V)

Article abstract of DOI:10.1007/BF00899258

Vanadium(V) oxidation of L-arabinose has been found to be first order with respect to oxidant and substrate concentrations.It has been found that the order with respect to changes from one in 2.5M-4.5M acid concentration range to two in 5.0M-6.5M acid concentration range.The oxidation rate has been found to increase with ionic strength and decrease with dielectric constant of the medium.Thermodynamic parameters ΔE, ΔS(excit.) and ΔG(excit.) have been evaluated as 22.63+/- 0.19 kcal/mol,-3.00+/- 0.65 e.u. and 23.59+/- 0.05 kcal/mol respectively.The reaction has been found to be initiated by the formation of free radical in a slow rate determining step. - Keywords: Kinetics of L-arabinose oxidation; Oxidation by vanadium(V)