Formation and photochemistry of organic sulfur compound–chlorine atom complexes

Abstract

Photochemical reactions of organic sulfur compounds (CH 3 SCH 3 , C 2 H 5 SCH 3 , and C 2 H 5 SC 2 H 5 ) _ chlorine atom complexes have been studied using a combined pulse radiolysis _ laser flash photolysis technique. Excitation of all complexes has resulted in photobleaching with a similar quantum yield (0.37 ± 0.07), independent of solvent polarities and concentration of solutes. The results were compared with previous studies of the analogous dimethyl sulfoxide (DMSO) _ Cl complexes. It is concluded that the significant change of photobleaching quantum yields of the excited DMSO _ Cl complex observed in the DMSO-CCl 4 mixed solvent is mainly due to the specific solvation effect of DMSO for cations.