Isomers of cyanodiacetylene: Predictions for the rotational, infrared and Raman spectroscopy
Recent ab initio (coupled-clusters) and density functional theory studies on cyanodiacetylene isomers are extended here to yield the quantities of direct interest to future spectroscopic investigations. A bond lengths scaling procedure was developed to obtain the corrected molecular geometries. These, together with calculated vibration–rotation coupling constants, yielded the ground-level rotational constants for seven most stable isomeric species of the HC5N stoichiometry. Former calculations regarding the vibrational transitions of these molecules are complemented here with predictions on Raman scattering activities, and on isotopic (2H, 15N) effects in IR absorption and Raman spectra.
Full text: J. Mol. Struct. 834-836 (2007) 102
Tags: ab initio, ISM molecules, isomers, microwave spectroscopy, molecular spectroscopy, Raman spectroscopy, rotational spectroscopy, vibrational spectroscopy
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