%0 DATA
%A P., Stoppa
%A D., De Vito
%A S., Giorgianni
%A A., Baldacci
%A R. Wugt, Larsen
%D 2019
%T High-resolution infrared spectrum of CHD_{2}^{79}Br: ro-vibrational analysis of the ν_{5} and ν_{9} fundamentals
%U https://tandf.figshare.com/articles/High-resolution_infrared_spectrum_of_CHD_sub_2_sub_sup_79_sup_Br_ro-vibrational_analysis_of_the_sub_5_sub_and_sub_9_sub_fundamentals/9638711
%R 10.6084/m9.figshare.9638711.v1
%2 https://tandf.figshare.com/ndownloader/files/17291858
%K FTIR spectroscopy
%K CHD2Br
%K Dideutero methyl bromide
%K ro-vibrational analysis
%K molecular parameters
%X The high-resolution infrared spectrum of CHD_{2}^{79}Br has been investigated by Fourier transform spectroscopy in the range 700–900 cm^{−1} at an unapodized resolution of 0.0035 cm^{−1}. This spectral region is characterised by the absorptions of the ν_{5} (814.5185 cm^{−1}) and ν_{9} (716.9649 cm^{−1}) fundamental bands, corresponding to H–C–Br deformation and CD_{2} rocking modes, respectively. The ν_{5} vibration of symmetry species *A*^{′} gives rise to an *a*-/*c*-hybrid band with a predominant *a*-type component, while the ν_{9} mode of *A*^{′′} symmetry produces a *b*-type envelope. The spectral analysis resulted in the identification of 5290 (*J*^{′} ≤ 63 and *K*_{a}^{′} ≤ 13) and 1657 (*J*^{′} ≤ 53 and *K*_{a}^{′} ≤ 12) transitions for ν_{5} and ν_{9} bands, respectively. The assigned data were fitted using the Watson’s *S*-reduced Hamiltonian in the I^{r} representation and the *v*_{5} = 1 and *v*_{9} = 1 state parameters up to the quartic centrifugal distortion terms have been obtained. From spectral simulations the dipole moment ratio |Δμ_{a}/Δμ_{c}| of the ν_{5} band has been determined to be 1.4 ± 0.1 while the intensity ratio between ν_{5} and ν_{9} fundamentals has been estimated to have a value of 4.3 ± 0.5.