c-C3H4
Cyclopropene
Species tag 040506
Version1
Date of EntryJune 2004
ContributorH. S. P. Müller

The experimental lines were taken from
(1) W. M. Stigliani, V. W. Laurie, and J. C. Li, 1975, J. Chem. Phys. 62, 1890; (2) M. Bogey, C. Demuynck, J. L. Destombes, and J. C. Guillemin, 1986, Chem. Phys. Lett. 125, 569; and from
(3) J. M. Vrtilek, C. A. Gottlieb, T. J. LePage, and P. Thaddeus, 1987, Astrophys. J. 316, 826.
Some transitions frequencies have been determined both in (2) and (3); these were found to differ by an average of about 40 kHz – outside of the combined uncertainties of mostly 20 and 10 kHz, respectively. The source of the discrapancies could not be determined unambiguously. Therefore, uncertainties of the transition frequencies in (1-3) were set to 50 kHz, unless already larger than that.
The dipole moment is from
(4) P. H. Kasai, R. J. Myers, D. F. Eggers, and K. B. Wiberg, 1959, J. Chem. Phys. 30, 512.
Spin-statistical weight ratios of 5 : 3 for levels having Ka even and odd, respectively, have been taken into account.

Lines Listed5718
Frequency / GHz< 2000
Max. J67
log STR0-9.0
log STR1-7.3
Isotope Corr.-0.0
Egy / cm-10.0
 µa / D0.455
 µb / D 
 µc / D 
 A / MHz30061.25
 B / MHz21825.79
 C / MHz13795.55
 Q(300.0)36912.2732
 Q(225.0)23971.9865
 Q(150.0)13050.1224
 Q(75.00)4618.9240
 Q(37.50)1637.5155
 Q(18.75)582.3009
 Q(9.375)208.3040
detected in ISM/CSMno


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