The very limited data set of the first entry from July 2012 was extended significantly by measurements between 164 and 1093 GHz by
(1) H. S. P. Müller, J. C. Guillemin, F. Lewen, and S. Schlemmer, 2022, J. Mol. Spectrosc. 384, Art. No. 111584.
The initial experimental data were taken from
(2) R. A. Creswell and R. H. Schwendemann, 1974, Chem. Phys. Lett. 27, 521.
Also used in the fit were microwave data from
(3) C. Hirose, 1974, Bull. Chem. Soc. Japan 47, 1311.
Uncertainties of data from (2) were increased to 20 kHz from 10 kHz because of the sizes of the average residuals. Three transitions with large residuals from (3) were omitted.
The calculation should be sufficiently accurate for all observational purposes. Calculated frequencies with uncertainties exceeding 0.1 MHz should be viewed with some caution.
Note: no non-trivial spin-statistics need to be considered for this low symmetry isotopolog. The rotation of the intertial axis sytem introduces a small a-dipole moment component.
The dipole moment components were derived from the main isotopolog and the structure both taken from
(4) G. L. Cunningham Jr., A. W. Boyd, R. J. Myers, W. D. Gwinn, and W. I. Le Van, 1951, J. Chem. Phys. 19, 676 ;
corrected by 0.02 D due to an updated reference value for OCS, see (1).