The Vibrational Spectrum of Chlorotrifluoroethylene

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Abstract
The infrared spectrum of gaseous F2C:CFCl has been reinvestigated in greater detail and over a more extensive region than in earlier work. Three hitherto unobserved bands have been found at 369, 338, and 194 cm−1. These data, together with the previously available Raman spectrum, have made possible the achievement of a new and more satisfactory fundamental assignment: 1792 (ν CC), 1336 (ν CF), 1215 (ν CF), 1058 (ν CF), 689 (ν CCl), 517 (δ CF2), 463 (ρ CF2), 338 (δ CFCl), 194 (ρ CFCl) for the planar vibrations; and 538 (β CF2), 369 (β CFCl), 158 (τ) for the out‐of‐plane modes. The ideal‐gas entropy value based on the present assignment agrees with that obtained calorimetrically.