On the Theory of Intramolecular Energy Transfer

We consider the distinguishing features of two main types of classical anharmonic motion in molecules, their quantum parallels, and conditions that classical chaos also be sufficient for "quantum chaos". Implications are considered for experimental reaction rates, R.R.K.M. theory, spectra and a possible type of system for intramolecular laser-selective chemistry. A theory of intramolecular energy transfer between two ligands of a heavy atom is described for a system which may contain many coordinates. It is partly statistical and, for the modes of each ligand which communicate through the heavy atom, dynamical.