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The Millimeter- and Submillimeter-Wave Spectrum of Gauche-Ethyl AlcoholWe report an investigation of the rotational-torsional spectrum of the gauche rotational isomers of ethyl alcohol in the 51-505 GHz frequency region. Over a thousand transitions between rotational levels in the gauche substates of the ground OH torsional state have been measured and assigned. These transitions involve rotational quantum numbers J and K(sub a) up to 30 and 15, respectively, and are of two types: alpha-type transitions between levels in either the gauche+ or the gauche-substate, and c-type transitions between rotational levels in the different substates. The majority of these transitions have been fit satisfactorily using a two-state Hamiltonian based on the Fixed Framework Axis Method (FFAM). The rotation, distortion, and interaction constants have been determined along with the energy difference between the two gauche substates. The derived constants can be used to predict many more transitions accurately for astronomical purposes. The J and K(sub a) region where the two-state analysis can be used has been determined. The basis for a three-state analysis including the trans substate is presented and the applicability of the FFAM approach is discussed.
Document ID
19990084094
Acquisition Source
Jet Propulsion Laboratory
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Pearson, J. C.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Sastry, K. V. L. N.
(New Brunswick Univ. Fredericton, New Brunswick Canada)
Herbst, Eric
(Ohio State Univ. Columbus, OH United States)
DeLucia, Frank C.
(Ohio State Univ. Columbus, OH United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1996
Publication Information
Publication: Journal of Molecular Spectroscopy
Publisher: Academic Press, Inc.
Volume: 175
Issue: Article 0030
ISSN: 0022-2852
Subject Category
Inorganic And Physical Chemistry
Distribution Limits
Public
Copyright
Other

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