Hydrogen isocyanide, 13C isotopolog
Species tag 028515
Date of EntrySep. 2009
ContributorH. S. P. Müller

The J" = 0 transition was taken from astronomical observations by
(1) F. F. S. van der Tak, H. S. P. Müller, M. E. Harding, and J. Gauss, 2009, Astron. Astrophys. 507, 347;
the J" = 1 transition was taken from laboratory measurements by
(2) R. A. Creswell, E. F. Pearson, M. Winnewisser, and G. Winnewisser, 1976, Z. Naturforsch. 31a, 221.
Also employed in the fit were rovibrational transitions from
(3) A. G. Maki and G. Ch. Mellau, 2001, J. Mol. Spectrosc. 206, 47.
Predictions above 500 GHz should be viewed with caution.
At low J, the 14N, H, and 13C hyperfine splitting has been resolved in part in astronomical observations. Therefore, a separate hyperfine calculation up to J" = 2 is provided along with partition function values. May 2013: The entry was reevaluated taking into consideration that uncertainties in (2) were 3σ values whereas we use 1σvalues. Date and version number of the entry have been retained.
The dipole moment was assumed to agree with that of HNC, see

Lines Listed25
Frequency / GHz< 2172
Max. J25
log STR0-5.0
log STR1-2.0
Isotope Corr.-1.955
Egy / cm–10.0
 µa / D3.05
 µb / D 
 µc / D 
 A / MHz 
 B / MHz43545.6
 C / MHz 
detected in ISM/CSMyes

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