Abstract
Abstract The microwave spectra of acrylaldehyde oxime and its deuterated derivative (CH2=CH–CH=NOD) were observed in the frequency region from 8.5 to 35 GHz. The several a-type R-branch transitions in the ground vibradonal state were identified and the following rotational constants in MHz were determined to be: A=34117±96, B=2363.007±0.011, and C=2210.616±0.011 for normal species and A=33950±103, B=2274.301±0.010, and C=2131.981±0.011 for deuterated species. The most plausible molecular structure to which the spectrum assigned is attributed has been deduced to be a s-trans syn geometrical conformer from the rotational constants experimentally determined. The dipole moment component μa in the ground vibrational state was determined to be 0.59 D from the Stark effects of J=2←1 transitions. The rs coordinates of the OH hydrogen atom have been determined and the orientation of the OH bond in the molecule has been discussed.
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