Atmospheric chemistry of CxF2x + 1CHCH2 (x = 1, 2, 4, 6, and 8): Kinetics of gas-phase reactions with Cl atoms, OH radicals, and O3

Long-path length FT-IR-smog chamber techniques were used to study the title reactions in 700 Torr of N2 or N2/O2, diluent at 296 K. There was no discernable effect of CxF2x + 1-group size on the reactivity of CxF2x + 1CHCH2 towards Cl atoms and OH radicals. Values of k(Cl + CxF2x + 1CHCH2) = (9.07 ± 1.08) × 10−11 cm3 molecule−1 s−1 and k(OH + CxF2x + 1CHCH2) = (1.36 ± 0.25) × 10−12 cm3 molecule−1 s−1 were measured. Ozone reacts more rapidly with CF3CHCH2 than with larger members of the series; k(O3 + CF3CHCH2) = (3.5 ± 0.3) × 10−19 cm3 molecule−1 s−1 and k(O3 + CxF2x + 1CHCH2) = (2.0 ± 0.4) × 10−19 cm3 molecule−1 s−1 (x ≥ 2). The atmospheric lifetime of CxF2x + 1CHCH2 (x ≥ 2) is approximately 8 days with 90% of removal occurring via reaction with OH and 10% via reaction with O3.