Reactive scattering of a supersonic oxygen atom beam. O + C2H3Cl, C2H3Br, C2H2F2 and C2HF3

Abstract

Reactive scattering of O atoms with C₂H₃Cl, C₂H₃Br, C₂H₂F₂ and C₂HF₃ molecules has been measured at an initial translational energy E≈ 35 kJ mol^–1 using a supersonic beam of O atoms seeded in He buffer gas. The O + C₂H₃Cl, C₂H₃Br reactions both exhibit two reaction pathways, one involving H atom displacement and the other involving halogen atom displacement. The O + CH₂CF₂, C₂HF₃ reactions also show two reaction pathways, one involving H atom displacement and the other involving carbon–carbon bond scission. All these reaction pathways are related to specific electronic states of the triplet diradical intermediates.