Journal of Physical Chemistry, Vol.99, No.10, 3201-3205, 1995
Atmospheric Chemistry of Cf3O Radicals - Reaction with CH4, CD4, CH3F, CF3H, (Co)-C-13,C2H5F, C2D6, C2H6, CH3OH, I-C4H8, and C2H2
A relative rate technique has been used to study the title reactions at 296 +/- 2 K. Using a reference rate constant of k(CF3O + CH4) = (2.2 +/- 0.2) x 10(-14) cm(3) molecule(-1) s(-1), rate constants (in 709 Torr of air diluent) for the reactions of CF3O radicals with the following reactants were established; CD4, (5.1 +/- 1.6) x 10(-15); CH3F, (2.4 +/- 0.3) x 10(-14); CF3H, <6 x 10(-16); (CO)-C-13, (7.2 +/- 0.7) x 10(-14); C2H5F, (3.2 +/- 0.5) x 10(-13); C2D6, (6.3 +/- 1.1) x 10(-13); C2H6, (1.4 +/- 0.3) x 10(-12); CH3OH, (2.5 +/- 0.4) x 10(-12); i-C4H8, (6.1 +/- 1.3) x 10(-12); C2H2, (1.7 +/- 0.3) x 10(-11) cm(3) molecule(-1) s(-1). The rate of the reaction of CF3O radicals with (CO)-C-13 was observed to be dependent on the total pressure. In 100 Torr of total pressure of air diluent, k(CF3O + (CO)-C-13) = (4.6 +/- 0.5) x 10(-14) cm(3) molecule(-1) s(-1). The reaction of CF3O with (CO)-C-13 gives (CO2)-C-13 in a yield of 96 +/- 896. Implications for the atmospheric chemistry of CF3O radicals are discussed.