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Rotational spectra of five conformers of glycerol
were studied. The GGag'g' conformer is
considered to be second lowest in energy, about
0.41 kJ/mol or 34 cm–1
or 49 K higher than the lowest energy form.
Please note that its lines may be stronger
because of the favorable dipole moment components.
The data were published by
(1) V. V. Ilyushin, R. A. Motioyenko, F. J. Lovas,
and D. F. Plusquellic,
2008, J. Mol. Spectrosc. 251, 129;
and by
(2) G. Maccaferri, W. Caminati, P. G. Favero,
1997, J. Chem. Soc. Faraday Trans. 93, 4115.
One line of (1) and three lines of (2) were omitted
because of large residuals.
The predictions have been truncated at J =
50 and at 200 GHz because of limited
experimental data. The predictions may be good
enough for initial identifications in space. However,
they should be viewed with caution if the predicted
uncertainties exceed 200 kHz.
NOTE: The
conformer was treated as an isolated species,
i.e., its lowest energy state was set to zero.
The partition function does not take into account
any conformational or vibrational corrections.
The dipole moment was determined in (1).
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