CENTRIFUGAL-DISTORTION EFFECTS FOR A MOLECULE WITH 2 INTERNAL ROTORS

The centrifugal distortion effects for a molecule containing two symme tric internal rotors are formulated. The explicit expressions that rel ate the distortion constants to fundamental molecular parameters are g iven, which are applicable for analysing molecular structure from the parameters determined from a fit-to-observed spectrum or for calculati ng the centrifugal distortion constants from well known fundamental mo lecular parameters. The reduced torsion-rotation Hamiltonian is given for a molecule with two, internal C-3v rotors with a symmetry plane wh ich contains both internal relation axes.