Abstract
The oxovanadium(IV)–salen-catalyzed H2O2 oxidation of phenols gives o-catechol and hydroquinone as the reaction products. The reaction follows Michaelis–Menten-type kinetics, and the rate is accelerated by electron-donating substituents on both the substrate and the salen ligand. This peculiar substituent effect is accounted for in terms of bond formation between peroxo group of the oxidant and the benzene ring of the substrate in the transition state. A suitable mechanism for the reaction is proposed.
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Prof. S.R thanks UGC, New Delhi, for sanctioning UGC-BSR Faculty Fellowship. A.M thanks the UGC, New Delhi, and the Management of V. O. C. College, Tuticorin, for sanctioning permission to avail the benefits of Faculty Development Programme (FDP). A.R is the recipient of UGC Meritorious fellowship under the Basic Scientific Research (BSR) Scheme.
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Mathavan, A., Ramdass, A. & Rajagopal, S. Kinetic study of the oxovanadium(IV)–salen-catalyzed H2O2 oxidation of phenols. Transition Met Chem 40, 355–362 (2015). https://doi.org/10.1007/s11243-015-9924-3
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DOI: https://doi.org/10.1007/s11243-015-9924-3