Kinetics of the reaction O( 3 P ) + SO 2 + M → SO 3 + M over the temperature range of 299°–440°K

Rate constants for the reaction O( 3 P ) + SO 2 + M have been determined over the temperature range of 299°–440°K, using a flash photolysis–NO 2 chemiluminescence technique. For MAr, the Arrhenius expression\documentclass{article}\pagestyle{empty}\begin{document}$$ k_2 ^{{\rm Ar}} {\rm = 3}{\rm .1 \times 10}^{{\rm - 32}} e^{{\rm - (2005 \pm 300)/RT}} {\rm cm}^{\rm 6} {\rm /molec}^2 \cdot \sec $$\end{document}was obtained. At room temperature k 2 Ar = (1.05 ± 0.21) × 10 −33 cm 6 /molec 2 ·sec. In addition, the rate constants k 2   N   2= (1.37 + 0.27) × 10 −33 cm 6 /molec 2 ·sec, k 2   SO   2= (9.5 ± 3.0) ± 10 −33 cm 6 /molec 2 ·sec, k 3   N   2= (1.1 ± 0.2) ± 10 −31 cm 6 /molec 2 ·sec, and k 3   SO   2= (2.6 − 0.9) ± 10 −31 cm 6 /molec 2 ·sec were obtained at room temperature where k 3 M is the rate constant for the reaction O + NO + M → NO 2 + M. The rate data are compared and discussed with literature values.