TRANSFER OF CLUSTERS BETWEEN THE VIBRATIONAL COMPONENTS OF CF4

The pattern of the rotation-vibrational energy levels in isolated vibr ational components of CF4 has recently been described (B. I. Zhilinski i et al., J. Mol. Spectrosc. 160, 192-216, 1993) in terms of the semic lassical model for the rotation of molecules. The present paper discus ses the interaction between neighboring vibrational components due to a transfer from one component to the other of either one 6-fold cluste r, one 8-fold cluster, one 12-fold cluster, or two 6-fold clusters. Th e rules for which transfers are possible are derived from a considerat ion of the formation of common points between the two corresponding cl assical rotational energy surfaces. These rules are conveniently state d in terms of the local symmetry indices (B. I. Zhilinskii and S. Brod ersen, J. Mol. Spectrosc. 163, 326-338, 1994) characterizing the symme tries of the two vibrational components. Three examples of such intera ctions are discussed in detail: first a crossing of one vibrational co mponent from the nu(3) vibrational state with one of the components fr om the 2 nu(4) state; second, a crossing of one vibrational component from the nu(3) vibrational state with the two components of the E subs tate of 3 nu(2); and finally, the rearrangement of the vibrational com ponents of the E and Fz substates of the 2 nu(4) vibrational state int o five components of the combined E + F-2 substate. (C) 1995 Academic Press, Inc.