Add time:08/20/2019         Source:sciencedirect.com

The microwave spectrum ofn-butyraldehyde oxime was observed in the frequency region 26.5–40 GHz. Four rotational conformers were found to exist in the gas phase; among these, two conformers belonged to the (E)-geometrical isomer and the other two to the (Z)-geometrical isomer. The microwave spectrum attributed to one of these two rotational conformers of (E)-butyraldehyde oxime was analyzed, and its rotational constants for the ground vibrational state were determined:A= 15883(379),B= 1269.97(1),C= 1251.60(1) MHz. The conformational structure of the molecule is discussed, referring to the rotational constants obtained and theab initiomolecular orbital calculation.

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