Algebraic models for the global description of the spectrum of a nonrigid molecule

Abstract

An approach to the construction of algebraic models for the global description of the energy levels and transitions of a nonrigid molecule that has nondegenerate electronic states but degenerate vibrational modes is developed using the symmetry methods. It is important that the correctness of such models is restricted only by the correct choice of the symmetry of the intramolecular dynamics.