Abstract
The pulsed laser photolysis–pulsed laser induced fluorescence (PLP–PLIF) technique has been used to study the reactions of OH with DMS and DMS-d 6. The effective rate coefficient for the reaction of OH with DMS-d 6 has been determined as a function of O 2 partial pressure at 600 Torr total pressure in N 2/O 2 mixtures at 298 and 261 K and for both DMS and DMS-d 6 at 240 K. Currently recommended rates are based on an empirical fit to a two-channel mechanism. This work shows that at low temperatures the currently recommended expression underestimates both the effective rate coefficient for reaction together with the branching ratio between addition and abstraction.
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