Reaction rates of O(3P) atom with fluoroethanes at 1000–1400 K

The overall rate constants for reactions of O(3P) with three fluoroethanes, O(3P)+CH3CH2F→OH+CH2CH2F/CH3CHF (1), O(3P)+CH2FCH2F→OH+CHFCH2F (2), and O(3P)+CH3CHF2→OH+CH2CHF2/CH3CF2 (3), were measured by laser flash photolysis in shock heated sample gases at 1000–1400 K. The rate constants were obtained in the simple Arrhenius form, k=Aexp(−Ea/RT), where A=2.19×10−9, 1.24×10−9 and 7.43×10−9 cm3 molecule−1 s−1 and Ea=58.0, 57.0 and 82.7 kJ mol−1, and uncertainty factors for k at 2σ level are F=1.36, 1.27 and 1.19, respectively. The effect of substitution of the fluorine atom on the overall rate constant is discussed in comparison with the corresponding rates for a series of alkanes and fluoromethanes.