Kinetic study of the reaction of IO with CH₃SCH₃

Abstract

Abstract The reaction IO + CH 3 SCH 3 → products (3) was studied at room temperature and near 1 Torr pressure of He, using the discharge flow mass spectrometric technique. The rate constant was found to be k 3 = (1.5 ± 0.5) × 10 −11 cm 3 molecule −1 s −1 . CH 3 S(O)CH 3 was detected as a product suggesting the following channel: IO + CH 3 SCH 3 → CH 3 S(O)CH 3 + I. The rate constant of the reaction IO + IO → products (1) was also measured: k 1 = (3 ± 0.5) × 10 −11 at 298 K and 1 Torr pressure. The atmospheric implication of reaction (3) is discussed. The results indicate that this reaction could be a potential important sink of CH 3 SCH 3 in marine atmosphere.