Abstract Kinetics of oxidation of twenty six S-arylmercaptoacetic acids (SAMA)(I) by sodium perborate (PB) have been studied in acid medium. The product of oxidation is the corresponding thiophenol. The rate data of meta-and para-substituted acids have been correlated with DSP equations. While the para-compounds correlate well with σ I and σ R values, the meta-compounds correlate well with σ I and σ math image values. The reaction ...