Abstract
The gas-phase conformational behavior of (Z)-butyraldehyde oxime (CH3CH2CH2CH=NOH), was determined by gas electron diffraction. Structural analysis under the two-dimensional (2D) dynamic model showed good agreement between the experimental and calculated molecular intensities. This model was derived from the large-amplitude vibrational motions around the CCCC and CCCN dihedral angles of the molecule. Two stable conformers, (ap, ap) and (+sc, ap), identified by microwave spectroscopy as well as quantum chemical calculations, belong to the low-energy region of the potential energy surface of the 2D dynamic model.
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