Rate constant of intermolecular electron transfer (ET) in a photoexcited donor-acceptor model system solvated by a cluster
of polar molecules has been expressed in terms of the statistical distribution of the electrostatic potential energy difference
between the reacting sites. This distribution has been calculated for a particular case of acetonitrile clusters a ≈120 K
by MD computer simulation. The MD values of the cluster reorganization energy and the ET rate constant have been compared
with the corresponding MD results for the donor-acceptor pair solvated in bulk acetonitrile and with theoretical predictions
based on the continuum model.