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

Article abstract of DOI:10.1021/j100201a049

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)^2.67exp<(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.