Atmospheric Fate of Chlorobromomethane: Rate Constant for the Reaction with OH,...
The rate constant for the reaction of CH2ClBr with OH was measured by both flash photolysis resonance fluorescence and discharge flow electron paramagnetic resonance techniques over the temperature range 277-370 K. The Arrhenius expression (3.04 +0.8/-0.6)×10-12×exp{-(978 ± 72)/T} cm3molecule-1s-1 was derived from a composite fit to both data sets. Absorption cross-sections of CH2ClBr were measured from 187 to 290 nm at 295 K. The solubility of CH2ClBr in water was also estimated to determine if such a process could be important in determining the atmospheric lifetime of CH2ClBr. The atmospheric lifetime and ozone depletion potential for CH2ClBr were estimated.