Infrared multiphoton dissociation of 1,1-dichloroethene

The relative translational energy of distribution of HCl and C2HCl formed in the infrared multiphoton dissociation of 1,1-dichloroethene was measured by the time-of-flight method. The mean translational energy was evaluated to be 46 kJ mol−1. The distribution estimated in this study was close to that estimated in the 193 nm photodissociation. The rate constants for the HCl elimination and 1,1–1,2 isomerization were calculated by employing RRKM theory on the basis of an ab initio potential surface. A model for the dissociation which includes the migration processes of H and Cl atoms was proposed to interpret the present and previous experimental results.