Gaseous Ion-Molecule Reactions of F(-), CF3(-), C2F5(-), CF3(+) and C2F5(+) WithHexafluoropropene Oxide

摘要

The gas-phase reactions of F(-), CF3(-), C2F5(-), CF3(+) and C2F5(+) withhexafluoropropene oxide (HFPO, C3F6O) have been studied using a selected ion flow tube (SIFT) instrument at 300K. Reactions of C4F9(-) and C3F7(+) with HFPO have also been studied as secondary reactions. Reaction rate constants and product branching fractions were measured. The F(-), CF3(-) and C2F5(-) ions react rapidly with HFPO. The major reaction process is the formation of CF2O and the corresponding negative product ions. A minor pathway is the production of the ion CF3O(-). Another reaction channel of F(-) and CF3(-) with HFPO is the formation of C2F4 and the corresponding ions. C4F9(-) ion reacts rapidly with HFPO.