MILLIMETER-WAVE SPECTRA OF $CH_{3}$ OH AND $CH_{3}{^{18}OH$
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Date
1997
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The ground state rotational spectra of $CD_{3}OH$ and $CH_{3}{^{18}}OH$ have been investigated in the millimeter-wave, range. Transitions in the frequency region between 119 and 176 GHz for $CE_{3}$ OH and between 119 and 167 GHz for $CH_{3}^{18}OH$ have been, measured using a source-modulated millimeter-wave spectrometer at the Physikalisch-Chemisches Institut, Giessen. The $CD_{3}OH$ transitions have been assigned based on predicted energy levels arising from the global fit of microwave and far-infrared data to a 55-term Hamiltonian pursued by M.S. Walsh, Li-Hong Xu and R.M, $Lees^{a}$. Comments will be made on the accuracy of these predictions. The measured $CH_{3}{^{18}}OH$ frequencies have been fitted to the more simplified Hamiltonian proposed by $Henningsean^{b}$. An improved set of molecular constants has been determined for $CH_{3} {^{18}}OH$.
Description
$^{a}$M.S. Walsh Li-Hong Xu and R.M. Lees, to be presented at this conference $^{b}$J. O. Henningsen J, Mol. Spectrosc. 85, 282-300 (1981)
Author Institution: Department of Physics, University of Toronto; Physikalisch-Chemisches Institut, Justus-Liebig-Universit\""at Geissen; Department of Physical Sciences, University of New Brunswick; Department of Physics, University of New Brunswick
Author Institution: Department of Physics, University of Toronto; Physikalisch-Chemisches Institut, Justus-Liebig-Universit\""at Geissen; Department of Physical Sciences, University of New Brunswick; Department of Physics, University of New Brunswick