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The experimental data were taken from
(1) J. Carlier, A. Bauer,
1980, Mol. Phys. 40, 231.
Some higher order parameters were taken or derived
from a study on SiH3CN by
(2) D. Priem, J. Cosléou, J. Demaison, I. Merke,
W. Stahl, W. Jerzembeck, and H. Bürger,
1998, J. Mol. Spectrosc. 191, 183.
Predictions should be viewed with caution above 250 GHz.
Note:
At low temperatures, it may be necessary to discern between
A-SiH3CCH and E-SiH3CCH.
The A state levels are described by
K = 3n, those of E state
by K = 3n ± 1.
The nuclear spin-weight ratio is 2 : 1 for
A-SiH3CCH with K > 0
and all other states, respectively.
The dipole moment was determined by
J. S. Muenter, V. W. Laurie,
1963, J. Chem. Phys. 39, 1181.
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