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Conformation of ethylene glycol from the rotational spectra of the nontunneling O-monodeuterated species

Authors
Journal
Journal of Molecular Spectroscopy
0022-2852
Publisher
Elsevier
Publication Date
Volume
90
Issue
2
Identifiers
DOI: 10.1016/0022-2852(81)90146-6

Abstract

Abstract The microwave spectrum of the two possible O-monodeuterated species has been measured in a mixture containing roughly 25% of each of the four possible OH OH , OH OD , OD OH , and OD OD isotopic species. Both spectra follow a semirigid rotor model without effects due to the tunneling of the two hydroxyl protons. Only one conformer has been detected: one oxygen is gauche with respect to the other; one hydroxyl hydrogen participates in the hydrogen bond, while the second one is trans with respect to the CC bond. Precise values for the quartic centrifugal distortion constants have been obtained for both species. A measure of the dipole moment is given.

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