High resolution FTIR spectra of dichlorodifluoromethane and bromochlor
odifluoromethane have been recorded on a Bruker HR120 spectrometer cou
pled to a supersonic jet nozzle apparatus. Rotational temperatures of
40K for Freon-12 and Halon-1211 have been achieved. An analysis of the
nu(1) band of Freon-12 has been carried out.