MICROWAVE SPECTRUM AND BARRIER TO INTERNAL ROTATION IN ASYMMETRIC MOLECULES: 2,3-DIFLUOROPROPENE
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Date
1974
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Ohio State University
Abstract
The investigation of the microwave and infrared spectrum of 2,3-difluoropropene;, $CH_{2} F$ - CF = $CH_{2}$ is reported. The microwave spectrum exhibited rotational transitions due to the gauche rotamer in five vibrational states of the torsionel mode. The spectrum provides data for an improved structure, and an estimate of the torsional energy level spacings. A value of the cis-gauche energy difference was obtained from absolute intensity measurements. The infrared spectrum gives the torsional energy level spacings in both the cis and gauche wells. A potential function for the internal rotation has been constructed using this data and is compared with potential functions for other fluoropropenes. The predictability of the threefold term in the potential is examined.
Description
This work supported, in part, by NSF GP-35672X.
Author Institution: Department of Chemistry, University of California; Department of Chemistry, University of California
Author Institution: Department of Chemistry, University of California; Department of Chemistry, University of California