SiC4
Tetratrienediylidenesilylene, Silapentatetraenediylidene 1Σ+
Species tag 076502
Version1
Date of EntryNov. 2000
ContributorH. S. P. Müller

The lines have been reported by
(1) M. Ohishi, N. Kaifu, K. Kawaguchi, A. Murukami, S. Saito, S. Yamamoto S. Ishikawa, Y. Fujita, Y. Shiratori, and W. M. Irvine, 1989, Astrophys. J. 345, L83; and by
(2) V. D. Gordon, E. S. Nathan, A. J. Apponi, M. C. McCarthy, P. Thaddeus, and P. Botschwina, 2000, J. Chem. Phys. 113, 5311.
The dipole moment is from a quantum chemical calculation in (2).
Aug. 2025: corrected the name according to the structure in (2).
Lines Listed99
Frequency / GHz< 304
Max. J99
log STR0-7.0
log STR1-3.0
Isotope Corr. 
Egy / (cm–1)0.0
 µa / D6.421
 µb / D 
 µc / D 
 A / MHz 
 B / MHz1533.772
 C / MHz 
 Q(300.0)4077.1525
 Q(225.0)3057.7103
 Q(150.0)2038.4265
 Q(75.00)1019.3009
 Q(37.50)509.7974
 Q(18.75)255.0606
 Q(9.375)127.6961
detected in ISM/CSMyes

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