13CC4H
Pentadiynylidyne, X 2Πr, 13C on C1
Species tag 062521
Version1*
Date of EntryMay 2015
ContributorH. S. P. Müller

The 2Π1/2 hyperfine split transition frequencies have been reported by
(1) M. C. McCarthy and P. Thaddeus, 2005, J. Chem. Phys. 122, Art. No. 174308.
We are greateful to M. C. McCarthy for providing initial files.
The fit has been carried out employing parameters and quantum numbers of Hund's case (b), as usual. Concerning Hund's case (a) quantum numbers, levels with J + 0.5 = N correlate with 2Π1/2 and levels with J – 0.5 = N correlate with 2Π3/2 for J ≤ 11.5; the correlation is reversed for J ≥ 12.5.
Predictions should be reliable up to about 100 GHz. Predictions for the hyperfine splitting in the higher lying 2Π3/2 spin component as well as those for transitions above 100 GHz should be viewed with great caution.
The dipole moment was assumed to agree with that of the main species, see e061505.cat.

Lines Listed1066
Frequency / GHz< 300
Max. J65
log STR0-8.5
log STR1-4.5
Isotope Corr.-1.975
Egy / (cm–1)0.0
 µa / D4.88
 µb / D 
 µc / D 
 A 
 B2319.352
 C 
 Q(300.0)40791.0708
 Q(225.0)30049.4589
 Q(150.0)19349.8917
 Q(75.00)8796.6798
 Q(37.50)3774.7745
 Q(18.75)1569.1936
 Q(9.375)698.8847
 Q(5.000)367.2320
 Q(2.725)202.8841
detected in ISM/CSMno


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