The rate coefficient of the reaction of OH with CF3CH2F at six temperatures in the range 255‐424 K was determined by means of the discharge‐flow/resonance‐fluorescence technique. The resonance fluorescence of OH, excited by emission from a gaseous mixture of H2O and He subjected to a microwave discharge, was detected by photon‐counting technique. The reaction was carried out under pseudo‐first‐order conditions with [CF3CH2F] >> [OH]; the rate coefficient was determined to be k = (3.9±0.6) × 10−15 cm3 molecule−1 s−1 at 298 K; the uncertainty represents the 95% confidence limit. The temperature dependence of the rate coefficient is expressed in the Arrhenius form, k(T) = (9.9±1.0) × 10−13 exp [‐(1640±150)/T] cm3 molecule−1 s1.
- Rate coefficient