A KINETIC-STUDY OF THE REACTION OF FLUORINE-ATOMS WITH CH3F, CH3CL, CH3BR, CF2H2, CO, CF3H, CF3CHCL2, CF3CH2F, CHF2CHF2, CF2CLCH3, CHF2CH3,AND CF3CF2H AT 295 + - 2-K/

A variety of relative and absolute techniques have been used to measur e the reactivity of fluorine atoms with a series of halogenated organi c compounds and CO. The following rate constants were derived, in unit s of cm3 molecule-1 s-1: CH3F, (3.7 +/- 0.8) x 10(-11), CH3Cl, (3.3 +/ - 0.7) x 10(-11); CH3Br, (3.0 +/- 0.7) x 10(-11); CF2H2, (4.3 +/- 0.9) x 10(-12); CO, (5.5 +/- 1.0) X 10(-13) (in 700 torr total pressure of N2 diluent); CF3H, (1.4 +/- 0.4) x 10(-13); CF3CC12H (HCFC-123), (1.2 +/- 0.4) x 10(-12); CF3CFH2 (HFC-134a), (1.3 +/- 0.3) x 10(-12), CHF2 CHF2 (HFC-134), (1.0 +/- 0.3) x 10(-12); CF2ClCH3 (HCFC-142b), (3.9 +/ - 0.9) X 10(-12), CF2HCH3 (HFC-152a), (1.7 +/- 0.4) x 10(-11); and CF3 CF2H (HFC-125), (3.5 +/- 0.8) x 10(-13). Quoted errors are statistical uncertainties (2sigma). For rate constants derived using relative rat e techniques, an additional uncertainty has been added to account for potential systematic errors in the reference rate constants used. Expe riments were performed at 295 +/- 2 K. Results are discussed with resp ect to the previous literature data and to the interpretation of labor atory studies of the atmospheric chemistry of HCFCs and HFCs. (C) 1993 John Wiley & Sons, Inc.