Abstract
The kinetics of ruthenium(III) chloride-catalyzed oxidation of glycine by N–bromophthalimide (NBP) was studied in aqueous perchloric acid at 35 °C. The results showed first- and zero-order behavior with respect to NBP and Gly, respectively. Ru(III) showed a catalytic effect on the reaction which followed first-order kinetics with respect to [Ru(III)] at a low concentration range and tended to zero order at high concentration range. The rates decreased with increase in the proton concentration, while chloride positively influenced the rate of the reaction. Two moles of NBP were required to oxidize one mole of Gly, and the products were identified as phthalimide (NHP), HCN, CO2, and Br−. Neither added NHP nor Br− influenced the reaction rate. Ionic strength and dielectric constant of the medium had no significant effect on the rate. Activation parameters were determined by studying the reaction at different temperatures. A reaction scheme of the catalytic oxidation is proposed.
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One of authors (AKS) thanks the University Grant Commission, Central Regional Office Bhopal (MP) for Minor Research Project grant. We wish to thank reviewers and specially Chief Editor for the critical and useful comments that refined the manuscript a lot.
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Singh, A.K., Jain, B., Negi, R. et al. Kinetic study of the ruthenium(III)-catalyzed oxidation of glycine by N-bromophthalimide in acidic medium. Transition Met Chem 35, 407–414 (2010). https://doi.org/10.1007/s11243-010-9342-5
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DOI: https://doi.org/10.1007/s11243-010-9342-5