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The molecule may be the second lowest energy isomer of
SiC3. The experimental transition frequencies
were taken from
(1) M. C. McCarthy, A. J. Apponi, and P. Thaddeus,
1999, J. Chem. Phys. 111, 7175.
Because of the very limited data (4 lines),
centrifugal distortion parameters were estimated
by
(3) H. S. P. Müller,
2014, unpublished.
A B3LYP/aug-cc-pwCQZ quantum-chemical calculation
was performed, and d2 was adjusted
based on other isotopologs with more data.
All predictions should be viewed with caution.
Deviations below 1 MHz may occur for
transitions with J up to 5.
The dipole moment is from an ab initio calculation
by
(2) H. S. P. Müller and D. E. Woon,
2013, J. Phys. Chem. A 117, 13868.
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