Electron spin resonance studies. Part XLII. The reactions of iodinecontaining compounds with hydroxyl and carbon radicals in aqueous solution

Abstract

E.s.r. spectroscopy and pulse radiolysis with optical detection have been employed to investigate the reactions of some iodine-containing compounds with the hydroxyl radical and with some simple carbon radicals. Competition experiments and direct measurements of the variation of radical concentration with time have afforded absolute rate constants for some of these reactions, including those of iodoacetic acid with ·OH [5 (±1)× 10⁹], ·CH₂OH [2·1 (±0·7)× 10⁸], and ·CH₂CMe₂OH [1·3 (±0·3)× 10⁷ l mol^–1 s^–1]. These data and possible reaction mechanisms are discussed.