Abstract
Absolute rate coefficient for the gas phase reaction of OH radical with thiophene has been measured using the laser photolysis (LP) – laser induced fluorescence (LIF) technique. The kinetics measurements were done over the temperature range of 272–353K and pressure range of 20–30Torr. The bimolecular rate coefficients obtained were pressure independent in the above pressure range and showed Arrhenius type behaviour which were fitted to the expression k(T)=(4.53±0.55)×10−12exp[(250±30)/T]cm3molecule−1s−1. The reaction shows weak negative temperature dependence. These results were discussed with available literature and the tropospheric lifetime of thiophene was calculated.
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