Kinetics of Oxidation of Benzoin by N. Bromosuccinimide

Abstract

Kinetics of Oxidation of Benzoin by N. Bromosuccinimide[NBS] 80% aqueous acetic acid has been investigated. The reaction follows first-order kinetics with respect to both[NBS] and [benzoin]. The effect of varying ionic strength and dielectric constant indicate the reaction is dipole-dipole type. Addition of succinimide(>NH), has a retarding effect on the rate of oxidation. The product of oxidation is benzil. By studying the effect of temparature on the reaction rate, the Arrhenius and the activation parameters have been calculated. A suitable mechanism has been proposed and a rate low explaining the experiment results is derived.

Kinetics and Mechanism of Oxidation of l-Proline by N-Bromosuccinimide in Aqueous Acidic Medium

“…Furthermore NBS has been extensively used for the oxidation of organic compounds, in this case the oxidation proceeded via the bromium ion (Br + ) − in polar media, or through a free radical path involving homolytic dissociation of (NBS). , Kinetics of benzoin oxidation by [NBS] in 80% aqueous acetic acid has been investigated; the reaction followed first-order kinetics with respect to both [NBS] and [benzoin]. The effect of varying ionic strength and the dielectric constant indicated that the reaction is a dipole–dipole type . Moreover, the oxidation of 3-carboxy-3-hydroxy pentanedioic acid (citric acid) by (NBS) in an acetic acid/sodium acetate buffered medium (pH 3.6–5.2) was carried out at 308 K and constant ionic strength.…”

“…The effect of varying ionic strength and the dielectric constant indicated that the reaction is a dipoleÀdipole type. 14 Moreover, the oxidation of 3-carboxy-3-hydroxy pentanedioic acid (citric acid) by (NBS) in an acetic acid/sodium acetate buffered medium (pH 3.6À5.2) was carried out at 308 K and constant ionic strength. The reaction rate was described as first order with respect to both 3-carboxy-3-hydroxy pentanedioic acid and NBS.…”