HCCS+
Ethynylsulfoniumylidene, ethynylsulfanylium, thioketenylium, X 3Σ–
Species tag 057517
Version1*
Date of EntryDec. 2021
ContributorH. S. P. Müller

The data are from astronomical observations in
(1) C. Cabezas, M. Agúndez, N. Marcelino, B. Tercero, Y. Endo, R. Fuentetaja, J. R. Pardo, P. de Vincente, and J. Cernicharo, 2022, Astron. Astrophys. 657, Art. No. L4.
The data set is somewhat limited. Therefore, transitions were truncated at 302 GHz and at N = 20. The calculations are sufficient for observations in cold environments, possibly not in warm ones. Transition frequencies with calculated uncertainties exceeding 0.1 MHz should be viewed with caution.
The dipole moment is from a coupled cluster quantum-chemical calculation by
(2) C. Puzzarini, 2008, Chem. Phys. 346, 45.
Lines Listed220
Frequency / GHz< 302
Max. J25
log STR0-10.0
log STR1-4.7
Isotope Corr. 
Egy / (cm–1)0.0
 µa / D2.29
 µb / D 
 µc / D 
 A / MHz 
 B / MHz6021.899
 C / MHz 
 Q(300.0)6102.3545
 Q(225.0)4544.8597
 Q(150.0)2988.4014
 Q(75.00)1434.9941
 Q(37.50)664.0936
 Q(18.75)288.4064
 Q(9.375)114.9371
 Q(5.000)48.1444
 Q(2.725)22.7678
detected in ISM/CSMyes

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