Laser Photolysis/Laser-Induced Fluorescence Studies of the Reaction of OH with 1,1,1-Trichloroethane over an Extended Temperature Range

Article abstract of DOI:10.1021/j100201a048

Absolute rate coefficients are determined for the gas-phase reaction of OH radicals with 1,1,1-trichloroethane over an extended temperature range.Employing a laser photolysis/laser-induced fluorescence technique, experiments were conducted with a flow system at a total pressure of 740 +/- 10 Torr using He as diluent and carrier gas.The rate coefficients, obtained over the temperature range 298-761 K, exhibited pronounced non-Arrhenius behavior and were best described by the modified Arrhenius equation k(T)=(3.95 +/- 0.78) x 10^-13(T/300)^2.08exp<(-1068 +/- 108)/T> cm³ molecule^-1 s^-1.Comparison of the data with numerous lower temperature measurements is presented.The temperature dependence of the data is compared with empirical and transition-state model calculations.The reactivity of this compound with OH compared to other chlorinated ethanes at both lower and higher reaction temperatures is presented and discussed.