13CH3CN, v = 0
Methyl cyanide, 13C on methyl group, v = 0
Species tag 042508
Version1*
Date of EntryDec. 2009
ContributorH. S. P. Müller

This entry is a combined CDMS and JPL entry.
The latest combined fit has been reported by
(1) H. S. P. Müller; B. J. Drouin, and J. C. Pearson, 2009, Astron. Astrophys. 506, 1487.
This work provides new data between 339 and 1193 GHz. Additional data were taken from
(2) J. C. Pearson and H. S. P. Müller, 1996, Astrophys. J. 471, 1067;
and from
(3) J. Demaison, A. Dubrulle, and D. Boucher, 1979, J. Mol. Spectrosc. 76, 1.
The purely K-dependent terms A and DK were assumed to agree with those of the main isotopolog, see e041505.cat.
The predictions are probably reliable throughout.
14N hyperfine splitting may be resolvable at low values of J and possibly at the highest K. Therefore, predictions with hyperfine splitting have been provided up to J" = 11 (230 GHz; July 2016); along with appropriate partition function values. Note: Vibrational contributions have not been considered in the calculation of the partition function yet. Rough estimates may be obtained by scaling the respective ground state value with the ratio from the main isotopolog.
At low temperatures, it may be necessary to discern between A-13CH3CN and E-13CH3CN. The A state levels are described by K = 3n, those of E state by K = 3n ± 1. The nuclear spin-weight ratio is 2 : 1 for A-13CH3CN with K > 0 and all other states, respectively. The JK = 11 level is the lowest E state level. It is 5.5715 cm–1 above ground.
The dipole moment was assumed to agree with that of the main isotopolog, see e041505.cat.

Lines Listed1636
Frequency / GHz<1755
Max. J99
log STR0-6.5
log STR1-7.5
Isotope Corr.-1.977
Egy / cm–10.0
 µa / D3.9220
 µb / D 
 µc / D 
 A / MHz158099.0
 B / MHz8933.3094
 C / MHzB
 Q(500.0)22436.3234
 Q(300.0)10418.8811
 Q(225.0)6765.7543
 Q(150.0)3682.5661
 Q(75.00)1302.7260
 Q(37.50)462.3803
 Q(18.75)169.1645
 Q(9.375)65.9716
detected in ISM/CSMyes


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