Radiofrequency, Microwave, Submillimeter-Wave, and High-Resolution Infrared Spectra of thev6= 1 Vibrational State of CDF3

The Reduced Effective Vibration–Rotational Hamiltonian for the vt = 2 Levels of C3v Symmetric-Top Molecules

“…Use of multiple fits has been advocated in Refs. (3,10,13), where it has been suggested that the relations between the parameters determined from the fits with the different reductions, such as given in Eqs. [12,13] In a similar way two extra relations besides Eq.…”

“…The value of the parameter s then can be specified by constraining one of the transformed parameters affected by it. Usually either two fits, one using the Q reduction and the other using the D reduction must obey the following relations (3,10):…”

“…The effect of the transformation on the molecular parameters can be written as follows (3,10): xxxz ϭ xxxz ϩ 12͑ A Ϫ B͒t, [4] q 12 ϭ q 12 ϩ 1 2 Fs, [5] d t ϭ d t ϩ 2q 22 s Ϫ 6At, [6] K ϭ K Ϫ 8q 12 s Ϫ 2Fs 2 , [7] J ϭ J ϩ 8q 12 s ϩ 2Fs 2 , [8] where…”

Radiofrequency, Centimeter-Wave, Millimeter-Wave, and Infrared Spectra of SiHF3: Investigation of the Ground, v4 = 1, and v6 = 1 Vibrational States

“…and A Ϫ is A 1 , see (18)) in the microwave range and the radiofrequency transition to be investigated. For J ϭ 42, both microwave transitions and thus both radiofrequency transitions have nearly the same frequencies.…”

“…According to theory (18), the signs of all parameters of the (2,2) and (2,Ϫ4) interactions are determined for a given sign of q 22 . Experimentally, the determination of the relative sign of q 22 and f 42 depends on significant perturbations between the G ϭ 0 and G ϭ 3 levels.…”