THE ROTATIONAL STRUCTURE OF THE VIBRATIONAL-STATES AND SUBSTATES OF SYMMETRY-E IN CF4

In continuation of previous papers on the rotational structure of vibr ational states in CF4 (S. G. Larsen and S. Brodersen, J. mol. Spectros c. 157, 220-236, 1993 and B. I. Zhilinski, S. Brodersen, and M. Madsen , J. mol. Spectrosc. 160, 192-216, 1993; and S. Brodersen and B. I. Zh ilinskii, J. Mol. Spectrosc. 169, 1-17, 1995) the splitting of the vib rational states or substates of symmetry E is discussed in detail. It is found that all such states split into two vibrational components, t he possible symmetries of which were predicted in a previous paper ( B . I. Zhilinskii and S. Brodersen, J. mol. Spectrosc. 163, 326-338 (199 4)). In the middle of each double manifold a cluster appears, the posi tion of which determines the symmetries of the two components. The sta tes nu(2), nu(1) + nu(2), and 3 nu(2)(E)in all three isotopic species are found to have a central 8(0) cluster which usually belongs to the upper component, causing this to have D-u((J+2)) symmetry and the lowe r to have D-g((J-2)) symmetry. For a few J values in the 3 nu(2)(E) of (CF4)-C-12 the central cluster belongs to the lower component, causin g this to have D-g((J+2)) symmetry and the upper component to have D-u ((J-2)) symmetry. The splitting of the 2 nu(2)(E) substate is complete ly different in all three isotopic species. The central 12(0) cluster belongs to the upper component, causing this to have D-g((J+4)) symmet ry and the lower to have D-u((J-4)) symmetry. Further possibilities of types of splittings are discussed. Finally, a review is given of the main results of all five papers. (C) 1995 Academic Press, Inc.