Kinetics of oxidation of pyridoxine by chloramine-T in acid medium.

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概要

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• The kinetics of oxidation of pyridoxine (PRX) by chloramine-T (CAT) in the presence of hydrochloric acid (0.04–0.14 M) have been studied over the temperature range of 303–323 K. The rate of the reaction shows first-order dependence on each of CAT, PRX, and chloride ion concentrations. The reaction rate is independent of hydrogen ion concentration. Variations of ionic strength and dielectric constant of the medium have negligible effect on the rate. Addition of the reaction product, <I>p</I>-toluenesulfonamide, decreases the rate showing a negative first order dependence. The solvent isotope effect has been studied by using heavy water. The activation parameters, <I>E</I><SUB>a</SUB>, <I>ΔH</I><SUP>\newq</SUP>, and <I>ΔS</I><SUP>\newq</SUP> are computed from the reaction rates at various temperatures. The mechanism of PRX oxidation proposed and the rate law derived are consistent with the observed kinetics.

• 公益社団法人 日本化学会の論文

著者

• Made Gowda

  Department Of Chemistry Western Illinois University

• Jayaram Beby

  Department of Chemistry, Central College, Bangalore University

• Jayaram Beby

  Department of Chemistry, V. V. Pura College of Science

関連論文

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• Kinetics and mechanism of oxidation of pyridoxine by sodium N-chlorobenzenesulfonamidate.
• Kinetics of oxidation of pyridoxine by chloramine-T in acid medium.

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