Cyclopropenylidene, isotopolog with 13C on C2
Species tag 039510
Date of EntryJune 2012
ContributorH. S. P. Müller

Please note that this entry deals with the asymmetric isotopomer with one 13C. 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. Some higher order parameters were taken from the main spcies and were kept fixed after scaling. Predictions with uncertainties larger than 0.5 MHz should be viewed with caution.
The 13C hyperfine splitting has been resolved to a large degree in (2). The hyperfine splitting may be be resolvable in astronomical observations of cold sources. Therefore, a separate hyperfine calculation is provided up to J = 2 and up to 150 GHz. The partition function values include the spin-multiplicity of the 13C 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 rotation of the inertial axis induces a sizable a-dipole moment component. The relative magnitude was derived in (2).

Lines Listed4041
Frequency / GHz< 2471
Max. J52
log STR0-7.0
log STR1-4.5
Isotope Corr.-1.980
Egy / (cm–1)0.0
 µa / D0.47
 µb / D3.23
 µc / D 
 A / MHz34857.19
 B / MHz31288.48
 C / MHz16443.04
detected in ISM/CSMyes

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