KINETICS STUDY OF THE TEMPERATURE-DEPENDENCE OF THE REACTIONS OF OH(2II) WITH CF3CHCL2, CF3CHCIF, AND CF2CLCH2CL

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 C2 alkanes. The nominal temperature range covered was 250–375 K. The compounds studied and the resulting Arrhenius expressions in units of cm3/molec·sec are (Formula Presented.) 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. Copyright © 1979 John Wiley & Sons, Inc.