Infrared and Raman Spectra of Fluorinated Ethanes. III. The Series CH3–CF3, CH3–CF2Cl, CH3–CFCl2, and CH3–CCl3

Abstract

New infrared spectra have been obtained for gaseous CH3–CF3 in the region 20–38μ, and in the region 2–38μ for gaseous CH3–CF2Cl and CH3–CFCl2, and CH3–CCl3 vapor and liquid, by use of LiF, NaCl, KBr, and KRS−5 optics. Raman spectra of gaseous and liquid CH3–CF2Cl and of CH3–CFCl2 and CH3–CCl3 in the liquid state have been obtained with a three-prism glass spectrograph of linear dispersion 15A/mm at 4358A. Depolarization ratios were obtained for all of the stronger Raman bands of the liquids. The spectra are interpreted, a complete assignment of fundamental frequencies is proposed for each molecule, and thermodynamic functions are calculated for the temperature range 298–600°K and at the boiling point.