Infrared and Raman spectra of fluorinated ethanes: Part XV. 1,1,2-Trifluoro-1,2,2-trichloroethane

Abstract

The infrared absorption spectrum of CF 2ClCFCl 2 at three different temperatures between 30° and 110°C was obtained in the region 300–400 cm −1 with a Perkin-Elmer double-pass spectrometer equipped with CsBr, NaCl, and LiF prisms. In addition, the infrared spectrum of the solid at −170°C was recorded in the region 350–2000 cm −1, and some of the absorption bands were studied in solution in solvents of different polarities. The Raman spectrum of the liquid at 30° and −40°C was photographed with a 3-prism glass spectrograph. In all three states of aggregation the compound exists as a mixture of rotational isomers. A value of 350 ± 150 cal/mole was found for Δ H o (gas). Tentative assignments were made for the fundamental vibrational frequencies.