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The rotational transition frequencies were reported
by
(1) R. A. Motiyenko, L. Margulès, D. Despois,
and J.-C. Guillemin,
2018, Phys. Chem. Chem. Phys. 20, 5509.
The reported uncertainties were slightly too conservative
and were adjusted.
The molecule displays commonly splitting caused by methyl
internal rotation; state number 0 signals the A
symmetry component, 1 the E symmetry component.
The quality of the predictions should be sufficient for
astronomical observations. Predictions with calculated
uncertainties exceeding 0.2 MHz should be viewed
with caution.
Please note that erham may label Kc
quantum numbers incorrectly for E symmetry components
of transitions with asymmetry splitting of about the same
magnitude as the tunneling splitting. Three pairs of
experimental lines were relabeled. Please note also that
the entry represents the lowest energy conformer only.
The partition function refers only to the ground vibrational
state of this conformer.
The theoretical dipole moment components were determined in (1).
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