A rovibrational analysis of the ν1 and ν2 bands of OCDF by supersonic jet FTIR spectroscopy

High resolution spectra of the ν1 (DF stretch) and ν2 (CO stretch) 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 ν1, ν0=2819.90104(18), B′=0.1031110(13), D′=3.113(22)×10−7; for ν2, ν0=2168.86239(16), B′=0.1010374(17), D′=3.355(45)×10−7. A Coriolis interaction between the ν1 excited state and a dark state was analyzed, which led to the estimation of the vibrational term value and rotational constant of the dark state.