Vibrational Spectra and Calculated Thermodynamic Properties of Ethyl Chloride and 1,1-Dichloroethane

The infrared absorption spectra of H3C–CH2Cl and H3C–CHCl2 in the gaseous and liquid states have been obtained in the region from 2 to 38μ with the aid of LiF, NaCl, KBr, and KRS-5 prisms. The Raman spectra of the liquids have been photographed with a 3-prism glass spectrograph of linear dispersion 15 A/mm at 4358A. Relative intensities and depolarization ratios have been measured for most of the Raman bands. Complete assignments of fundamental vibrational frequencies have been made, the spectra have been interpreted in detail, and thermodynamic functions have been calculated for the compounds in the gaseous state.