Flash photolysis resonance fluorescence investigation of the reaction of OH radicals with dimethyl sulfide

Rate constants for the reaction of OH radicals in a homogeneous gas phase reaction with dimethyl sulfide have been determined using the flash photolysis resonance fluorescence technique over the temperature range 273–400 K. The data (combined with the results of another recent study) can be fit to the Arrhenius expression k = (6.08 ± 2.54) × 10^?12 exp[(134 ± 135)/T] cm³ molecule^?1 s^?1 applicable from 273–426 K. The results are discussed in terms of reaction mechanisms and in light of recent suggestions that dimethyl sulfide plays an important role in the transport of natural sulfur to the earth's atmosphere.