Kinetics of hydroxyl radical reactions with the atmospheric sulfur compounds hydrogen sulfide, methanethiol, ethanethiol, and dimethyl disulfide

摘要: The flash photolysis-resonance fluorescence technique has been employed to study the kinetics of hydroxyl radical reactions with H/sub 2/S (k/sub 1/), CH/sub 3/SH 2/), 3/SCH/sub 3/ 3/), and 3/SSCH/sub 4/) over temperature range 244 367/sup 0/K. following Arrhenius expressions adequately describe measured rate constants as a function (units are cm/sup molecule/sup -1/ s/sup -1/): k/sub 1/ = (6.4 +- 1.3) x 10/sup -12/ exp((55 58)/T); 2/ (1.15 0.39) -11/ exp((+338 100)/T); (6.8 1.1) exp((-138 46)/T); 4/ (5.9 3.3) exp((+380 160)/T). results compared previous investigations, their implications regarding reaction mechanisms atmospheric sulfur chemistry discussed.