Rovibrational constants for the ground state and ν8 = 1 state of ethylene-d3 (C2HD3) by high-resolution FTIR spectroscopy

► High-resolution FTIR spectrum of ν8 band of C2HD3 recorded. ► Rovibrational constants for ν8 = 1 state of C2HD3 determined for the first time. ► C2HD3 ground state constants were also determined for the first time.