FLASH-PHOTOLYSIS RESONANCE FLUORESCENCE INVESTIGATION OF THE REACTION OH + CH3CC13-]H2O + CH2CC13

The absolute rate constant for the reaction OH + CH3CCl3 → H2O + CH2CCl3 has been determined by the flash photolysis resonance fluorescence technique from 253 to 363K. The results are used to recommend the Arrhenius expression in units of cm³ molec−1s−1. Use of this equation with atmospheric observational data on methyl chloroform nearly doubles the predicted tropospheric OH reaction sink strength for the removal of important atmospheric gases whose lifetimes are controlled by OH. Comparison of the results reported here with previously reported literature values indicates a strong interference of olefinic impurities on the past investigations. This paper is not subject to U.S. copyright.