Extended high-resolution analysis of the ν₁₀ band of C₂D₄

The high–resolution Fourier–transform spectrum of C₂D₄ 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 ν₁₀ 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 (v₁₀=1) vibrational state are reproduced by a set of 47 fitted spectroscopic parameters with the drms=2.2×10⁻⁴ cm−1. Line list of the ro–vibrational transitions of the ν₁₀ band is presented in the Supplementary material.