HIGH-RESOLUTION INFRARED SPECTRA OF $CH_{2}D_{2}$

Author Institution: Laboratoire d'Infrarouge, Laboratoire associ\'e au CNRS Universit\'e de Paris VIHigh-resolution spectra, recorded either on Fourier transform or SISAM-type spectrometers, allow very good determination of vibration-rotation constants of $CH_{2}D_{2}$. The $\nu_{1}$ and $\nu_{6}$ lines were assigned between 2900 and $3300 cm^{-1}$ in a spectrum obtained with a Fourier transform spectrometer. The experimental data have led to very accurate molecular constants for the ground state of the molecule. The Watson Hamiltonian including eight constants fits 404 ground state combination differences with a standard deviation of $0-0007 cm^{-1}$. Constants for $\nu_{1}$ = 1 and $\nu_{6} = 1$ levels were also determined. The $\nu_{9}$ band was recorded between 1100 and $1340 cm^{-1}$ on a newly built SISAM-spectrometer having a spectral resolution of $0.012 cm^{-1}$ near $1170 cm^{-1}$. More than 450 lines have been assigned until now