Analysis of rovibrational structure of the $\nu_6$ fundamental band of $^{13}$CHF$_3$

A study of the high-resolution IR spectrum of the fundamental $\nu_6$ band of the $^{13}$CHF$_3$ molecule located in the region 450–750 cm$^{-1}$ has been carried out for the first time. The ground state combination differences method was used for analysis. As a result of the analysis, about 5500 transitions were assigned. On that base 2607 experimental values of the energies of the state ($v_6$ = 1) were determined. The obtained results exceed the information known in the literature both in the amount of experimental information and in the number of highly excited vibrational-rotational energies extracted from the experimental data. Based on the spectroscopic data the spectroscopic parameters of the studied state were determined, which reproduce the initial data with an accuracy of 4.4 $\cdot$ 10$^{-5}$ cm$^{-1}$.