Translational energy distribution of the unimolecular HX(X=F,Cl) elimination reactions

Abstract

The translational energy distribution from the metastable of the C₂H₃F⁺ ion has been obtained using a new model of metastable peak shape simulation. This transition represents a class of the unimolecular HX(X=F,Cl) elimination reactions in terms of the energy partitioning pattern. However, it is unique in that the fractional translational energy release is 0.69±10% based on an estimate of the total available energy. The energy distribution is characterized by an average energy of 0.95 eV (±5%) with a half‐width of ∼0.2 eV. The origin of the translational energy is discussed in terms of a four‐centered transition model on a repulsive potential surface in the exit channel. Comparisons are made between the metastable reaction of the C₂H₃F⁺ ion and similar neutral reactions.