A kinetics study of the temperature dependence of the reactions of OH(²Π) with CF₃CHCl₂, CF₃CHClF, and CF₂ClCH₂Cl

Abstract

Abstract The flash photolysis resonance fluorescence technique has been utilized to determine the rate constants for three reactions involving the hydroxyl radical [OH( 2 ≅)] and three halogenated C 2 alkanes. The nominal temperature range covered was 250–375 K. The compounds studied and the resulting Arrhenius expressions in units of cm 3 /molec·sec are equation image The error limits in these expressions are such that they include any possible systematic errors due to the presence of impurities in the halocarbon samples. Tropospheric lifetimes have been calculated for the above species by combining the above rate constant data with global seasonally and diurnally averaged hydroxyl radical concentrations.