Vibrational structure of hydrogen cyanide up to 18 900 cm^−1

Infrared Transitions of H12C14N and H12C15N between 500 and 10000 cm−1

“…In recent years there have been several new techniques that allow one to observe very weak transitions or transitions that These measurements were made in Giessen with a Bruker IFS120HR Fourier transform spectrometer which are not accessible through ordinary absorption spectroscopy techniques (1)(2)(3)(4)(5). One of the most promising of these new has vacuum transfer optics and various absorption cells.…”

Complete experimental rovibrational eigenenergies of HCN up to 6880 cm−1 above the ground state

“…The standard deviation for the first 71 vibrational constants decrease from 0.0020 cm −1 to 0.008 cm −1 in the weighted fit. The lower two panels shows the error plot for the same model with the same set of parameters for 234 vibrational constants including the vibrational constants of highly excited vibrational states from the SEP measurements of Yang et al 63,66 and the results of Martinez et al 73,74 The third panel shows the error plot for a 1/σ 2 i weighted fit. The σ i was set to the standard deviation of the vibrational constants, for the first 164 states it was set to the 0.05 cm −1 model error.…”

“…[41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56] The work of Lehmann et al 57 is the starting point for experiments designed to record spectra for the detection of the highly excited rovibrational states of the [H,C,N] molecular system. [58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73][74] Over time the number of the detected band centers increased steadily. The sensitivity of all these experiments regarding the detection of highly excited bending states and highly excited rotational states was relatively low so that each work described only a small part of the overall rovibrational eigenenergy structure.…”

Classical dynamical analysis of the vibrational spectra for small polyatomic molecules

“…They lie in the high chaotic region and they are the only ones among the families, which we found to show complex instability. Yang et al [29] in their SEP spectra of HCN found that about 20% of the observed lines were not assigned in terms of the normal modes. They conclude that these states should be perturbed from the states of the HNC well and thus could be delocalized.…”

“…Baronavski [ 271 studied low resolution dispersed fluorescence spectra for the transition A'A" --* X ' Z ' , whereas the high resolution SEP spectra are currently being studied by Wodtke and co-workers [28,29]. Coy et al [30] have studied infrared overtone spectra with up to six quanta in the CH stretch mode.…”