In order to adequately describe rotation of photofragments and dynamics of vector correlations in liquids, we have
generalized the J-diffusion model by allowing the rotational relaxation rate to be angular momentum dependent.
The calculated nonequilibrium rotational correlation functions (CFs) are shown to decay much slower than their
equilibrium counterparts, and orientational CFs of hot photofragments exhibit coherent behavior, which persists
for several rotational periods. In practical terms, the standard and generalized J-diffusion models are shown
to be almost indistinguishable under equilibrium conditions. Far from equilibrium, their predictions may differ dramatically.