The experimental lines are from
(1) K. Georgiou, H. W. Kroto, and B. M. Landsberg,
1979, J. Mol. Spectrosc. 77, 365.
Some higher order centrifugal distortion constants
were estimated by
(2) H. S. P. Müller, 2022, unpublished.
Calculations of transition frequencies with
Ka = 0 and 1 may be reliable to 53 GHz,
possibly to 120 GHz. Transition frequencies with Ka
larger than 1 should be viewed with increasing caution.
The calculation were limited to Ka = 5.
There are no non-trivial spin-statical weight ratios
in HDC2S.
The dipole moment of the main isotopolog was
determined by
(3) M. Winnewisser and E. Schäfer,
1980, Z. Naturforsch. A 35, 483.
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