A study of the intermolecular ν51 vibration in OCH35Cl based on near infrared spectroscopy

The near infrared ν2 + ν51 combination bands of OCH35Cl and OCH37Cl have been recorded using a high frequency wavelength modulation diode laser supersonic jet spectrometer. In addition, the static gas phase spectra of the associated ν2 + ν51 − ν51 and ν2 + 2ν52 − 2ν52 hot bands in OCH35Cl have been recorded using Fourier transform infrared absorption spectroscopy. The combined results permitted the evaluation of the band origin of 48.9944(2) cm−1, a rotational constant of 0.0565731(6) cm−1, a distortion constant of 1.906 × 10−7(6) cm−1, and the Coriolis coupling constant of 0.0001466(2) cm−1 for the low frequency intermolecular bending vibration of the OCH35Cl isotopomer.