“…If ðjvCi jv e Ci ¼ B 1g , then the Coriolis interaction operator of the C type is written as, Refs. [48,49] Table 3 Small part of the list of assigned transitions of the m8 þ m10 band. …”
Section: Theoretical Background: the Hamiltonian Modelmentioning
“…If ðjvCi jv e Ci ¼ B 1g , then the Coriolis interaction operator of the C type is written as, Refs. [48,49] Table 3 Small part of the list of assigned transitions of the m8 þ m10 band. …”
Section: Theoretical Background: the Hamiltonian Modelmentioning
“…Because the states (v 3 = 1), (v 4 = 1), and (v 6 = 1) of the D 13 2 CO molecule have the symmetries A 1 , B 2 , and B 1 , respectively, the interactions between the pairs of those states are described by the following operators, see [25]:…”
“…In physical chemistry ethylene is also intensively studied since it can be considered as a prototype for a large number of organic molecules. As can be seen from the foregoing, the high-resolution ethylene spectra have long been the object of close attention (for example, see review presented in [12] and [13][14][15][16][17][18][19][20][21][22][23][24] [37][38][39]) between vibrational states 1> = ( 4 = 1, А 2 ) and |2> = ( 6 = 1, B 1 ) and has the following form [40,41]: …”
The spectrum of the ν 6 band of the cis-ethylene-d 2 molecule (cis-C 2 H 2 D 2 ) is recorded with a Bruker IFS 125 HR Fourier spectrometer in the range 580-1210 cm -1 with resolution of 0.0021 cm -1 . An analysis of the experimental spectrum allows more than 1500 transitions belonging to this band to be assigned that by more than 2.5 times greater than it has been known in the literature so far. The obtained experimental data are then used to determine the model parameters of the molecule (the effective Hamiltonian in the A-reduction and I-representation). Strong resonance interaction with the band ν 4 forbidden in absorption by the symmetry of a molecule is taken into account. 10 parameters of the Hamiltonian obtained by solving inverse spectroscopic problem reproduce 427 initial experimental energies (more than 1500 transitions) with accuracy close to the experimental uncertainty.
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