C2H
Ethynylide ion, acetylide ion, X 1Σ+
Species tag 025504
Version2*
Date of EntryJan. 2009
ContributorH. S. P. Müller

The experimental measurements were taken from
(1) S. Brünken, C. A. Gottlieb, H. Gupta, M. C. McCarthy, and P. Thaddeus, 2007, Astron. Astrophys., 464, L33
.
With respect to the Mar. 2007 entry, several submillimeter transitions up to about 830 GHz were used in the fit. They were published by
(2) T. Amano, 2008, J. Chem. Phys. 129, Art. No. 244305
.
The predictions should be reliable up to about 2 THz.
The ab initio dipole moment was taken from
(3) M. Mladenovic, P. Botschwina, P. Sebald, and S. Carter, 1998, Theor. Chem. Acc. 100, 134.

Lines Listed37
Frequency / GHz< 3062
Max. J37
log STR0-3.0
log STR1-4.0
Isotope Corr.-0.0
Egy / (cm-1)0.0
 µa / D3.09
 µb / D 
 µc / D 
 A / MHz 
 B / MHz41639.24
 C / MHz 
 Q(500.0)250.8293
 Q(300.0)150.5610
 Q(225.0)112.9846
 Q(150.0)75.4216
 Q(75.00)37.8722
 Q(37.50)19.1038
 Q(18.75)9.7236
 Q(9.375)5.0396
detected in ISM/CSMno


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