Cyclopropenylidene, isotopolog with one D
Species tag 039508
Date of EntryJune 2012
ContributorH. S. P. Müller

The transition frequencies were largely taken from
(1) M. Bogey, C. Demuynck, J. L. Destombes, and H. Dubus, 1987, J. Mol. Spectrosc. 122, 313.
Additional lines were published by
(2) S. Spezzano, F. Tamassia, S. Thorwirth, P. Thaddeus, C. A. Gottlieb, and M. C. McCarthy, 2012, Astrophys. J. Suppl. Ser. 200, Art. No. 1.
The uncertainties in (1) are overall somewhat conservative. Nevertheless, one line with large residual already in (1) has been omitted from the final fit. The parameter set is similar to that in (1), but ΦKJ and ΦJK were not used.
Predictions with uncertainties larger than 0.5 MHz should be viewed with caution.
The deuterium hyperfine splitting has been resolved to a large degree in (2).
The hyperfine splitting can also be resolved in astronomical observations of cold sources. Therefore, a separate hyperfine calculation is provided up to J = 3 and up to 60 GHz. The partition function values include the spin-multiplicity of the D nucleus.
Note: Non-trivial spin-statistics do not matter for this low symmetry (CS) isotopolog.
The total dipole moment was taken from the main species, see e038506.cat. The large rotation of the inertial axis induces a sizable a-dipole moment component. The relative magnitude was derived in (2).

Lines Listed5195
Frequency / GHz< 2381
Max. J53
log STR0-7.0
log STR1-4.5
Isotope Corr.-3.822
Egy / (cm–1)0.0
 µa / D1.21
 µb / D3.04
 µc / D 
 A / MHz34517.52
 B / MHz26965.81
 C / MHz15098.46
detected in ISM/CSMyes

Database maintained by Holger S. P. Müller and Sven Thorwirth, programming by D. Roth and F. Schloeder