Extended high-resolution analysis of the ν10 band of C2D4

Abstract The high–resolution Fourier–transform spectrum of C 2 D 4 was recorded at the optical resolution of up to 0.00096 cm − 1 and analyzed in the region of 460–710 cm − 1 , where the whole ν 10 band was considered including P, Q and R branches. The experimentally recorded line positions (5040 experimental lines with J max . = 47 and K a max . = 27 ) are theoretically analyzed, and effective spectroscopic parameters are derived from the corresponding fit procedures. The 1247 ro–vibrational energies of the ( v 10 = 1 ) vibrational state are reproduced by a set of 47 fitted spectroscopic parameters with the d r m s = 2.2 × 10 − 4  cm − 1 . Line list of the ro–vibrational transitions of the ν 10 band is presented in the Supplementary material.