The fundamental band ν2 of D213CO

The ν2 band of D213CO in the region of 1570-1760 cm−1 has been analyzed with high accuracy. The limits of the quantum numbers J and Ka are 50 and 16, respectively. The number of the assigned transitions is 3858. A local anharmonic resonance ν2/2ν4 at Ka =  8-12 was observed. The Watson's A-reduced Hamiltonian and anharmonic resonance term were fitted to the observed transitions. The fit resulted in the band center and rotational parameters of the ν2 band as well as the effective parameters for the 2ν4 band and anharmonic resonance parameter. The rms deviation of the transitions in the ν2 band was 0.000364 cm−1.