A flash photolysis–resonance fluorescence kinetics study of ground‐state sulfur atoms. II. Rate parameters for reaction of S(3P) with C2H4

Absolute rate constants for the reaction of S(3P) with ethylene were measured over an ethylene concentration range of 7, a total pressure of 50 to 400 torr, and a flash intensity range of 10. At 298°K, the bimolecular rate constant was found to be invariant over this range of variables and had a measured value of 4.96 × 10−13 cm3 molec−1 s−1. Over the temperature range of 218° to 442°K, the rate data could be fit to a simple Arrhenius equation of the form Units are cm3 molec−1 s−1. The dependence of the measured value of k1 on the concentration of the reaction product ethylene episulfide is discussed.