The ν5 and ν3 Raman bands of CH2D2 |
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Authors: | JC Deroche G Graner Jørgen Bendtsen Svend Brodersen |
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Institution: | Laboratoire d''Infrarouge, Laboratoire Associé au CNRS, Université de Paris XI, Campus d''Orsay, Bâtiment 350, 91405 Orsay, France;Department of Chemistry, Aarhus University, Aarhus, Denmark |
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Abstract: | The ν5 and ν3 Raman bands of CH2D2 have been recorded with a resolution of 0.35 cm?1. The ν3 state is well known from infrared studies. Three hundred twenty-nine transitions of the ν5 band were analyzed, assuming an unperturbed upper state, giving a standard deviation on the fit of the upper-state energies of 0.037 cm?1, The constants A, B, C, ΔJ, ΔJK, and ΔK differed significantly from the ground-state values, and ν5 was determined as 1331.41 ± 0.05 cm?1. This work represents the first complete analysis of the fine structure of a rotation-vibrational Raman band for an asymmetric rotor. The ν5 state could not be analyzed in infrared so this investigation, once more, demonstrates the usefulness of the Raman method. |
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