Dynamics of H2 elimination from 1,4-cyclohexadiene

Abstract
The dynamics of H2 elimination from 1,4‐cyclohexadiene (CHDN), dissociated with 212 nm light, have been studied by state specific probing of the H2 product via (1+1) REMPI using a transform limited vacuum ultraviolet laser system. The quantum state distributions, the translational energy distribution and the Doppler profiles were measured giving a ‘‘rotational temperature’’ of ≂1600 K, a ‘‘vibrational temperature’’ of ≂4000 K, and a translational energy of ≂30 kcal/mol for H2. Anisotropy in the Doppler profiles indicates that the H2’s velocity vector is aligned parallel to its rotational angular momentum vector.