Journal of Chemical Physics, Vol.103, No.21, 9132-9137, 1995
Free Jet Ir Spectroscopy of ((SF6)-S-32)(2) in the 10 Mu-M Region
The rotation-vibration spectra of ((SF6)-S-32)(2) have been studied near the nu(3) band of the (SF6)-S-32 monomer. The parallel band 14 cm(-1) below the monomer band origin shows a well resolved J-structure, while the perpendicular band 8 cm(-1) above the origin exhibits several Q-branch peaks as the only resolved strong lines. The structure of ((SF6)-S-32)(2) is consistent with a D-2d symmetry from the intensity alternation and the existence of a first-order Coriolis interaction observed in the perpendicular band. The energy difference between the two bands is very close to the value calculated by a dipole-dipole and dipole-induced dipole interaction model, while the location of the two bands is blueshifted from the calculated values by about 2 cm(-1). The possible influence of internal rotation is discussed.
Keywords:INFRARED-ABSORPTION SPECTROSCOPY;VIBRATIONAL PREDISSOCIATION;HELIUM CLUSTERS;TOP MOLECULES;SF6 CLUSTERS;SIF4;SPECTRUM;DIMERS;PHOTODISSOCIATION;SIH4