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      https://www.ias.ac.in/article/fulltext/jcsc/097/05-06/0555-0563

    • Keywords

       

      Peroxomonosulphate; oxidation of sulphoxides; structure-reactivity relationship

    • Abstract

       

      Detailed kinetic investigations of the oxidation of methyl phenyl sulphoxide and diphenyl sulphoxide by peroxomonosulphate in aqueous acetic acid medium reveal that the reactions are first-order, both in the sulphoxide and in the oxidant. Studies with substituted phenyl methyl sulphoxides and 4,4′-disubstituted diphenyl sulphoxides show that electron-releasing groups accelerate the rate of oxidation and electron-withdrawing groups retard it. A fair correlation between log k2 and Hammett substituent constants has been observed in the two series. The mechanism proposed involves the rate-determining nucleophilic attack of the sulphoxide sulphur at the outer terminal peroxo oxygen atom of HSO5.

    • Author Affiliations

       

      R Suthakaran1 P Subramaniam1 C Srinivasan1

      1. School of Chemistry, Madurai Kamaraj University, Madurai - 625 021, India
    • Dates

       
  • Journal of Chemical Sciences | News

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