J. Phys. Chem. A 1997, 101, 8035-8041
8035
Kinetics and Mechanism of the Gas Phase Reaction of Atomic Chlorine with CH2ICl at 206-432 K M. Bilde, J. Sehested, and O. J. Nielsen Atmospheric Chemistry, Building 313, Plant Biology and Biogeochemistry Department, Risø National Laboratory, DK-4000 Roskilde, Denmark
T. J. Wallington,* R. J. Meagher, and M. E. McIntosh Ford Research Laboratory, SRL-3083, Ford Motor Company, P.O. Box 2053, Dearborn, Michigan 48121-2053
C. A. Piety,† J. M. Nicovich,‡ and P. H. Wine*,†,‡,§ Georgia Institute of Technology, Atlanta, Georgia 30332 ReceiVed: June 3, 1997; In Final Form: August 12, 1997X
The title reaction was studied using two different experimental techniques: laser flash photolysis with resonance fluorescence detection of Cl atoms and continuous photolysis with FTIR detection of end products. Over the temperature range 206-432 K the rate constant for reaction of Cl atoms with CH2ICl is given (to within (15%) by the Arrhenius expression k1 ) 4.4 × 10-11 exp(195/T) cm3 molecule-1 s-1, which gives k1 ) 8.5 × 10-11 cm3 molecule-1 s-1 at 298 K. Variation of the total pressure of N2 diluent over the range 5-700 Torr at 295 K had no discernible (
