A ROVIBRATIONAL ANALYSIS OF THE NU(1) AND NU(2) BANDS OF OC-DF BY SUPERSONIC JET FTIR SPECTROSCOPY

High resolution spectra of the nu(1) (DF stretch) and nu(2) (CO stretc h) vibrations of the hydrogen bonded dimer OC-DF were recorded using a supersonic jet Fourier transform infrared spectrometer. The following molecular constants were obtained (in cm(-1)): for nu(1), nu(0) = 281 9.90104(18), B' = 0.1031110(13), D' = 3.113(22) x 10(-7); for nu(2), n u(0) = 2168.86239(16), B' = 0.1010374(17), D' = 3.355(45)x 10(-7). A C oriolis interaction between the nu(1) excited state and a dark state w as analyzed, which led to the estimation of the vibrational term value and rotational constant of the dark state.