Vibrational Spectra of Some Fluoromethanes

Depolarization measurements have been made on the Raman spectrum of fluoroform and difluoromethane. Several new lines were observed, all of which had previously been found in infra-red absorption. Several weak lines reported previously could not be found and presumably must be ascribed to impurities in the material used by earlier investigators. The analyses given for the vibration spectra now seem to be in plausible agreement with all the known spectroscopic data on these molecules.