Polarisation effects in the e.s.r. spectra of radicals formed by the hydroxyl radical attack on the anions of acetylenedicarboxylic acid and benzene-1,3,5-tricarboxylic acid

Abstract

Novel polarisation effects in the radicals ^–O₂CĊHCOCO₂^– and a cyclohexadienyl adduct from benzene-1,3,5-tricarboxylate (the radicals are produced by the reaction of the hydroxyl radical generated from the Ti^III–H₂O₂ couple) gave e.s.r. signals which are wholly in emission and are observed above pH ca. 8; the significant pair reaction responsible evidently involves electron transfer from Ti^III to the radicals concerned.