THE SUBMILLIMETER SPECTRUM OF THE GROUND HYDROXYL TORSIONAL STATE OF ETHYL ALCOHOL ($CH_{3}CH_{2}OH$)
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Date
1996
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Ohio State University
Abstract
The ground state spectrum of the three torsional sub-states (trans, guanche+ and gauche-) of the asymmetric internal hydroxyl rotation in ethyl alcohol has been recorded through 652 GHz. Our previous $trans^{a}$ and $gauche^{b}$ work has been expanded to include approximately 3000 assigned transitions through J = 40 and $K_{a} = 17$ including approximately 1000 which show significant deviation from a standard asymmetric rotor pattern due to trans-gauche interactions. The location of these interactions has enabled us to determine the trans-gauche energy difference accurately. The application of a fixed-frame-axis method (FFAM) Hamiltonian to this asymmetric top-asymmetric frame internal rotation problem is discussed. The results of a three-state FFAM analysis are presented.
Description
$^{a}$ J. C. Pearson, K. V. L. N. Sastry, M. Winnewisser, E. Herbst and F. C. De Lucia, J. Phys. Chem. Ref. Data 24, 1 (1995) $^{b}$ J. C. Pearson, K. V. L. N. Sastry, E. Herbst and F. C. De Lucia, J. Mol. Spectrosc., in press (1996)
Author Institution: Jet Propulsion Laboratory, California Institute of Technology; Department of Physics, University of New Brunswick; Department of Physics, The Ohio State University
Author Institution: Jet Propulsion Laboratory, California Institute of Technology; Department of Physics, University of New Brunswick; Department of Physics, The Ohio State University