Reactive scattering of crossed supersonic beams: Cl+ CH I I Cl+ CH I 2 2 2

The reaction Cl+CH2I2-->ICl+CH2I has been studied at a relative collision energy of 53.2 kJ mol(-1) using the crossed-beam technique. Angular and translational energy distributions of reactive scattered ICl products have been measured. The angular distribution is consistent with reaction occurring through a short-lived complex with lifetime about 0.8 of the rotational period. The kinetic energy distributions measured for this system show strong coupling to scattering angles. The forward-and backward-scattered products have higher translational energy than those that are sideways scattered. A phase-space model is developed which explains the experimental energy distributions well.