Vibrational spectra and rotational isomerism of 2,2-difluoropropyl chloride

Infrared spectra were obtained for 2,2-difluoropropyl chloride in the neat liquid, vapor, and solid states, and Raman spectra were obtained for the liquid. This compound exists as a mixture of trans and gauche rotamers in the vapor and liquid states, but only the trans form is present in the solid. Vibrational assignments were made for the two rotamers with the aid of zero-order normal coordinate calculations using force constants transferred from 2,2-difluoropropane and 1,1,1-trifluoroethyl chloride.