Rotational spectra of three conformers of glyceraldehyde were studied. However, for the two higher lying ones even fewer data are available. Moreover, they are much higher in energy than low-lying vibrational states of the lowest energy conformer. The data were publsihed by
(1) F. J. Lovas, R. D. Suenram, D. F. Plusquellic, and H. Møllendal, 2003, J. Mol. Spectrosc. 222, 263.
Predictions with calculated uncertainties larger than 100 kHz should be viewed with caution. Nevertheless, strong transitions with fairly small uncertainties occur even at 2 mm wavelength. Deviations larger than 1 MHz from the predictions should be expected for all transitions with uncertainties larger than 300 kHz.
The dipole moment was determined in (1).