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The observed lines are from
(1) M. J. Travers, W. Chen, J.-U. Grabow, M. C. McCarthy,
and P. Thaddeus,
1998, J. Mol. Spectrosc. 192, 12.
The purely K-dependent parameters (A and
DK), needed to obtain reasonable intensities,
were taken from CH3CCH;
(2) H. S. P. Müller, P. Pracna, and V.-M. Hornemann,
2002, J. Mol. Spectrosc., 216, 397.
The dipole moment is an estimate. Predictions have been
truncated at K = 6. Nevertheless,
predictions at higherJ and K should be
viewed with great caution.
Please note: the
entry has been reevaluated April 2013 to resolve minor
issues.
The dipole moment is an estimate.
At low temperatures, it may be necessary to discern between
A-CH3C8H and
E-CH3C8H. The A states
are described by K = 3n, the E
states by K = 3n ± 1.
The nuclear spin-weight ratio is 2 : 1
for A-CH3C8H with
K > 0 and all other states, respectively.
The JK = 11 state
is the lowest E state. It is
5.3074 cm–1 above ground.
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