Atmospheric chemistry of C2F5CH2OCH3 (HFE-365mcf)

Abstract

FTIR smog chamber techniques were used to measure k(Cl + C₂F₅CH₂OCH₃) = (2.52 ± 0.37) × 10⁻¹¹ and k(OH + C₂F₅CH₂OCH₃) = (5.78 ± 1.02) × 10⁻¹³ cm³ molecule⁻¹ s⁻¹ in 700 Torr of air diluent at 296 ± 1 K. The atmospheric lifetime of C₂F₅CH₂OCH₃ is estimated to be 20 days. Reaction of chlorine atoms with C₂F₅CH₂OCH₃ proceeds 18 ± 2% at the –CH₂– group and 82 ± 2% at the –CH₃ group. Reaction of OH radicals with C₂F₅CH₂OCH₃ proceeds 44 ± 5% at the –CH₂– group and 56 ± 5% at the –CH₃ group. The atmospheric fate of C₂F₅CH₂OCH₂O radicals is reaction with O₂ to give C₂F₅CH₂OCHO. The atmospheric fate of C₂F₅CH(O)OCH₃ radicals is C–C bond-cleavage to give C₂F₅ radicals and CH₃OCHO (methyl formate). The infrared spectrum was recorded and used to estimate a global warming potential of 6 (100 year time horizon) for C₂F₅CH₂OCH₃.