Kinetics, products, and mechanism for the reaction of E-CF3CH=CHC2F5 with OH radicals in gas phase and atmospheric implications

E-CF₃CH=CHC₂F₅ is a promising substance that could be used as high temperature bump working fluid. In this study, the rate constants (k₁) for the reaction of E-CF₃CH=CHC₂F₅ with OH were measured by the relative rate method: k₁ (298 K) = (9.10 ± 0.29) × 10^-14 and k₁ (253-328 K) = (7.56 ± 0.88) × 10^-13 exp [-(632 ± 35)/T] cm³ molecule^-1 s^-1. The atmospheric lifetime of E-CF₃CH=CHC₂F₅ was estimated to be 127 d, while its radiative efficiency (RE) was evaluated to be 0.198 W m^-2 ppb^-1. The estimated POCPs of E-CF₃CH=CHC₂F₅ were estimated to be 0.5 and 0.2 for North-west European and USA urban conditions, respectively. The 20, 100, and 500-year time horizon global warming potentials (GWPs) of E-CF₃CH=CHC₂F₅ were estimated to be 73, 20, and 6, respectively. CF₃OOOCF₃, CF₃OOOC₂F₅, COF₂, CO, and CO₂ were identified as the carbon-containing products following the degradation of E-CF₃CH=CHC₂F₅.