Absolute Infrared Intensities in Crystalline C2H4 and C2D4
- 15 December 1962
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 37 (12) , 2990-2995
- https://doi.org/10.1063/1.1733130
Abstract
Absolute infrared intensities of the ungerade fundamentals of crystalline C2H4 and C2D4 have been measured under high spectral resolution at 63°K and compared with the available intensity data in the gas phase. The intensity changes from gas to solid vary considerably among modes of the same symmetry species. Attempts to predict the transfer of intensity among certain vibrational modes in the crystal by an intermolecular hydrogen repulsion coupling mechanism have met with limited success. Intensity sum rules are discussed.Keywords
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