NEW ANALYSIS OF EXPERIMENTAL DATA FOR THE SECOND HEXAD (050), (130), (210), (012), (031), (111) OF H162O MOLECULE INTERACTING STATES

Abstract A new theoretical model of an effective Hamiltonian for non-rigid H 2 X-type molecules, based on the generating function approach, is applied to the experimental energy levels of the second hexad of interacting states of H 2 O. The experimental energy levels for J ≤ 11 and J ≤ 15 of the 5 vibrational states (130), (210), (111), (012), (031) are fitted with an average discrepancy r.m.s. = 12.0 × 10 −3 cm −1 and r.m.s. = 14.4 × 10 −3 cm −1 , respectively. The influence of interactions of the mentioned pentad with (050) and (060) vibration states is discussed.