HSiCCH
Ethynylsilylene, X 1A'
Species tag 054522
Version1*
Date of EntryFeb. 2024
ContributorH. S. P. Müller

The experimental lines are from
(1) M. C. McCarthy, P. B. Changala, and P. B. Carroll, 2024, J. Mol. Spectrosc. 400, Art. No. 111886.
Only Ka = 0 transition were detected thus far. The extrapolation should be good up to possibly 150 GHz.
The dipole moment is from a quantum chemical calculation by
(2) S. Thorwirth, and M. E. Harding, 2009, J. Chem. Phys., 130 Art. No. 214303.

Lines Listed19
Frequency / GHz< 200
Max. J19
log STR0-8.3
log STR1-4.5
Isotope Corr. 
Egy / (cm–1)0.0
 µa / D0.86
 µb / D(0.14)
 µc / D 
 A / MHz~225200.
 B / MHz5250.90
 C / MHz5126.94
 Q(300.0)11262.2464
 Q(225.0)7314.2488
 Q(150.0)3981.3039
 Q(75.00)1408.0930
 Q(37.50)498.3318
 Q(18.75)176.5648
 Q(9.375)62.7224
 Q(5.000)25.1216
 Q(2.725)11.7090
detected in ISM/CSMno


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