Kinetics and Mechanism of the Oxidation of Aryl Methyl Sulphides with Pyridinium Dichromate
| Main Authors: | G. MANGALAM, SUBBIAB MEENAKSHI SUNDARAM |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 1991
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5954236 |
Daftar Isi:
- Department of Chemistry. Faculty of Engineering & Technology, Annamalai University, Annamalainagar 608 002 Manuscript received 7 November 1989, revised 24 August 1990, accepted 26 January 7997 Kinetics of the oxidation of aryl methyl sulphides (CH,SAr) with PDC yielding sulpboxides were Investigated in aqueous acetic acid medium. The rate equation, \(\nu\)=\(\kappa\) [sulphide)[oxidant] was found to be valid. The observed substituent effect is explained by an electrophlllc attack of PDC oxygen on sulphide, leading to a polar transition state. The reaction did not induce polymerisation of acrylonitrile. Addition of MnII decreased the rate considerably indicating the Involvement of transient species. Decomposition of the complex formed between the sulphide and oxidant was assumed as the rate-determining step. On the basis of the results, a suitable mechanism has been proposed.