Mg13CCH
Magnesium monoacetylide, X 2Σ+, 13C on C1
Species tag 050521
Version1*
Date of EntryMay 2024
ContributorH. S. P. Müller

The lines were reported by
(1) P. B. Changala, N. Genossar-Dan, E. Brudner, T. Gur, J. H. Baraban, and M. C. McCarthy, 2023, Proc. Natl. Acad. Sci. USA 120, Art. No. e2303586120.
Several parameters were evaluated from the main isotopolog. A typographical error was corrected for one transition frequency.
The calculation may be sufficiently accurate up to 50 GHz; some caution may be advisable at higher frequencies.
The dipole moment of the main isotopolog was taken from a quantum-chemical calculation by
(2) D. E. Woon, 1996, Astrophys. J. 456, 602.

Lines Listed165
Frequency / GHz< 120
Max. J12
log STR0-8.0
log STR1-5.0
Isotope Corr. 
Egy / cm–10.0
 µa / D1.68
 µb / D 
 µc / D 
 A / MHz 
 B / MHz4944.24
 C / MHz 
 Q(300.0)10128.2912
 Q(225.0)7594.6898
 Q(150.0)5062.5226
 Q(75.00)2531.7892
 Q(37.50)1266.9608
 Q(18.75)634.6832
 Q(9.375)318.5824
 Q(5.000)171.0843
 Q(2.725)94.4009
detected in ISM/CSMno


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