High resolution Fourier transform spectroscopy of CH2D2 in the region 2350-2650 cm(-1): the bands nu(5)+nu(7), 2 nu(9), nu(3)+nu(4), nu(3)+nu(7) and nu(5)+nu(9)

摘要

The IR spectrum of the CH2D2 molecule has been measured in the region of 2350 - 2650 cm(-1) on a Bomem DA002 Fourier transform spectrometer with a resolution of 0.004 cm(-1) (FWHM, apodized) and analyzed with a Hamiltonian model which takes into account resonance interactions between all vibrational states in that region. More than 3000 transitions have been assigned to the bands 2nu(9), nu(3) + nu(4), nu(5) + nu(9), nu(5) + nu(7) and nu(3)+nu(7) using ground state combination differences from the known ground state parameters. A set of 115 spectroscopic parameters for the excited vibrational states is obtained from a least squares adjustment. This reproduces the 646 initial upper ro-vibrational energies used in the fit with a d(rms) = 0.0036 cm(-1).