High-Resolution Jet-Cooled Spectroscopy of SF6: The ν2+ ν6Combination Band of32SF6and the ν3Band of the Rare Isotopomers

Simultaneous Analysis of the ν2 Raman and ν2 + ν6 Infrared Spectra of the SF6 Molecule

“…Finally we calculated the spectrum of 2 ϩ 6 and moved lightly some assignments (4). With this model we could fit 559 lines of 2 with a root-mean-square (rms) of 2.1 ϫ 10 Ϫ3 cm…”

“…Four 2 parameters were determined. The root-mean-square obtained using about 559 data up to J ϭ (4). The values of 6 parameters are determined with good accuracy.…”

“…The infrared active modes of octahedral XY 6 molecules are of F 1u symmetry, so only 3 (1) and 4 are allowed in absorption while transitions to A 1g , E g , and F 2g levels are Raman allowed giving the possibility of observing 1 , 2 , and 5 . The fundamental 6 mode is inactive in both Raman and infrared absorption.…”

“…To study this region it is necessary to know the 6 level. The 2 ϩ 6 level was obtained previously by the analysis of the 2 ϩ 6 infrared spectrum (4). At this time the 2 level was not known with a sufficiently good accuracy (2,3), so a new study of this band is essential to obtain a better set of parameters.…”

Development of the Dipole Moment and Polarizability Operators of Octahedral Molecules

“…For several molecules in Table 1, there exist spectra for which a theoretical model for the interpretation of intensities would be necessary. This does not concern only fundamental bands anymore; for example, the high-resolution spectrum of the 2 ϩ 6 combination band of 32 SF 6 has been recently investigated (5).…”