Abstract
The rate constant k(OH) for the reaction of 1,1,1,3,3,3-hexafluoroprop-2-imine with OH radicals was measured relative to two reference compounds, CH(3)F and CH(3)CHF(2), to be k(OH) = (4.2 ± 1.1) × 10(-14) cm(3) molecule(-1) s(-1) at 295 K. This implies an atmospheric lifetime with respect to consumption by OH of 0.75 years. Reaction with Cl atoms yielded k(Cl) = (7.9 ± 1.7) × 10(-16) cm(3) molecule(-1) s(-1) at 295 K, and reaction with O(3) has an upper limit of k(O3) < 4 × 10(-23) cm(3) molecule(-1) s(-1), so that the atmospheric consumption by Cl and O(3) is negligibly slow. Absolute infrared cross sections of the imine yield a radiative efficiency of 0.34 W m(-2) ppb(-1), which is corrected to 0.23 W m(-2) ppb(-1) for the effects of atmospheric lifetime. The imine's corresponding 100-year global warming potential is 64 ± 19. This value is an upper limit, given that heterogenous atmospheric removal paths, such as hydrolysis in water droplets, are not included.