Iminomethane, methanimine, 13C isotopolog
Species tag 030514
Date of EntryMay 2014
ContributorK. Kobayashi
H. S. P. Müller

Transition frequencies were reported by
(1) Y. Motoki, F. Isobe, H. Ozeki, and K. Kobayashi, 2014, Astron. Astrophys. 566, Art. No. A28.
The authors retained in their fit also few data from
(2) R. Pearson, Jr. and F. J. Lovas, 1977, J. Chem. Phys. 66, 4149.
Data with uncertainties of 100 kHz or more were not merged. The predictions should be accurate enough for all radioastronomical observations. Specifically, predictions with uncertainties larger than 0.3 MHz should be viewed with some caution.
14N hyperfine splitting may matter in astronomical observations. Therefore, a separate hyperfine calculation is provided for J' ≤ 20 and Ka' ≤ 5 up to 1 THz. NOTE: The partition function does take into account the spin multiplicity of the 14N nucleus !
The dipole moment components were assumed to agree with those of the main species reported by
(3) M. Allegrini, J. W. C. Johns, and A. R. W. McKellar, 1979, J. Chem. Phys. 70, 2829.

Lines Listed1629
Frequency / GHz< 2000
Max. J36
log STR0-7.5
log STR1-5.0
Isotope Corr.-1.957
Egy / cm–10.0
 µa / D1.340
 µb / D1.446
 µc / D 
 A / MHz196195.49
 B / MHz33747.23
 C / MHz28706.33
detected in ISM/CSMnot unambiguously

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