International Journal of Chemical Kinetics p. 46 - 51 (2007)
Update date:2022-08-10
Topics:
Meenakshisundaram, Subbiah
Sarathi
Mechanistic studies on the oxidation of indole [IND] by HSO 5- in aqueous CH3CN medium (80:20 v/v) have been carried out, and the reaction is characterized by the rate law -d[HSO 5-]/dt = k[IND][HSO5-]HSO5 - and SO52- are probably the respective electrophiles in acidic and basic mediums. Nucleophilic attack of the ethylenic bond on the persulfate oxygen is envisaged to explain the reactivity. The reaction fails to initiate polymerization, and a radical mechanism is ruled out. Thermodynamic parameters very much suggest a bimolecular process. No significant catalytic activity is observed for the reaction system in the presence of Ag+, Cu2+, and heteroaromatic N-bases.
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