The electron-impact dissociative ionization of CCl2F2

An investigation of the formation channels and properties of ion fragments following electron-impact dissociative ionization of the CCl2F2 molecule using electron kinetic energies in the 0-100 eV range is reported. Measurements of ion appearance potentials (APs) and nascent translational energy distributions were made on a supersonic expansion of CCl2F2 in a time-of-flight mass spectrometer. A discussion of the correlation between the channel APs, the precursor bond characters as calculated from the population analysis, and the low-resolution photoelectron spectrum of the CCl2F2 molecule is presented.