Rangappa, K. S. and Esterline, D. T. and Mythily, C. K. and Mahadevappa, D. S. and Ambekar, S. Y. (1993) Oxidation of indoles by n-chloro-n-sodio-p-toluenesulphonamide in alkaline medium catalysed by osmium(VIII): a kinetic study. Polyhedron, 12 (14). pp. 1719-1724.
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The kinetics of oxidation of indoles (1a-d) to the corresponding oxindole by the title oxidant in alkaline medium catalysed by osmium(VIII) at 30-degrees-C has been studied. The reaction shows first-order each in chloramine-T] (2), Os(VIII)] (3) and indole] (1a). Effects of added anions and p-toluenesulphonamide (5) as well as varying ionic strength and dielectric constant of the medium have been investigated. Activation parameters have been computed. An isokinetic relationship was observed with beta = 325, indicating enthalpy as the rate-controlling factor. With the available data, including the substituent effects (rho+ = -1.0) which were obtained from a Hammett plot, the proposed mechanism and the derived rate laws are in agreement with the observed kinetics.
| Item Type: | Article |
|---|---|
| Subjects: | C Chemical Science > Chemistry |
| Divisions: | Department of > Chemistry |
| Depositing User: | Users 23 not found. |
| Date Deposited: | 06 May 2021 06:10 |
| Last Modified: | 07 Jul 2022 08:03 |
| URI: | http://eprints.uni-mysore.ac.in/id/eprint/16307 |
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