High resolution spectroscopy of strongly interacting bands $\nu_4$, $\nu_6$, $\nu_7$, $\nu_8$, and $\nu_{10}$ of deuterated ethylene, C$_2$H$_3$D

Rotational structure of strongly interacting bands $\nu_4$, $\nu_6$, $\nu_7$, $\nu_8$, and $\nu_{10}$ of the C$_2$H$_3$D molecule is spectroscopically studied. Spectra were recorded by Fourier spectrometer Brucker 125HR in the laboratory of physical and theoretical chemistry of Technical University of Braunschweig. 27950 transitions with maximum values of $J^{\mathrm{max}}$ = 40 and $K^{\mathrm{max}}_a$ = 20 were assigned to the studied bands. The effective Hamiltonian parameters were determined in the model including the $\nu_3$ resonating state. The 4028 upper energy levels were used as incoming data. They are reproduced with root mean square deviation of $d_{\mathrm{rms}}$ = 1.7 $\cdot$ 10$^{-4}$ cm$^{-1}$. Corresponding value for more than 24000 line positions is $d_{\mathrm{rms}}$ = 2.1 $\cdot$ 10$^{-4}$ cm$^{-1}$.