Laser photolysis/laser-induced fluorescence studies of the reaction of hydroxyl with 1,1,1-trichloroethane over an extended temperature range
摘要:
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)2.08 exp{(-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.
Laser photolysis/laser-induced fluorescence studies of the reaction of hydroxyl with 1,1-dichloroethane over an extended temperature range
作者:Zhen Jiang、Philip H. Taylor、Barry Dellinger
DOI:10.1021/j100201a049
日期:1992.10
Absolute rate coefficients are determined for the gas-phase reaction of OH radicals with 1,1-dichloroethane over an extended temperature range using a laser photolysis/laser-induced fluorescence technique. Experiments were performed in 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 294-800 K, exhibited pronounced non-Arrhenius behavior and were best described by the modified Arrhenius equation k(T) = (8.29 +/- 0.36) X 10(-14)(T/300)2.67 exp(378 +/- 18)/T} CM3 Molecule-1 s-1. Comparison of the data with one previous room-temperature measurement is presented. The temperature dependence of the data is compared with empirical and transition-state model calculations. The influence of C-H bond energy and Cl substitution is discussed.
Laser photolysis/laser-induced fluorescence studies of the reaction of hydroxyl with 1,1,1-trichloroethane over an extended temperature range
作者:Zhen Jiang、Philip H. Taylor、Barry Dellinger
DOI:10.1021/j100201a048
日期:1992.10
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)2.08 exp(-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.