Kinetics and Mechanism of Oxidation of P-Methoxyazobenzene by N-Halo-P-Tolunenesulfonamides in Acid Medium
Journal Title: IOSR Journal of Applied Chemistry (IOSR-JAC) - Year 2018, Vol 11, Issue 7
Abstract
The kinetics of oxidative decolorization of p-methoxyazobenzene (PMAB) by chloramine-T (CAT) and bromamine-T (BAT) in HClO4 medium has been investigated spectrophotometrically (λmax = 347 nm) at 298 K. Kinetic runs were performed under pseudo first-order conditions of [oxidant]o >> [PMAB]o. The reactions show first-order dependence on [oxidant]o and [PMAB] and a fractional-order dependence on [HClO4]. Stoichiometry of the reaction was found to be 1:1 and the oxidation products were identified. The reaction was studied at different temperatures and various activation parameters have been computed. Effects of ptoluenesulfonamide, halide ions, ionic strength and dielectric constant of the medium have been investigated. Reaction mixture fails to induce polymerization of acrylonitrile. Plausible mechanism and related rate law have been deliberated for the observed kinetics.
Authors and Affiliations
T. Naveen Kumar, T. V. Venkatesha
Keywords
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