THE MICROWAVE SPECTRUM OF THE METHOXY RADICAL, $CH_{3}O$: HYPERFINE STRUCTURE AND JAHN-TELLER INTERACTION

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1984

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Ohio State University

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Zero field pure rotational transitions of the methoxy radical in the ${^{2}}E$ ground electronic state have been observed in the mm-wave region. The observation was made by a mini-computer controlled microwave spectrometer equipped with a fast flow 1 m free space absorption cell. The reaction $CH_{3}OH + (CF_{4})_{MW disch}$. was employed to generate the radical. The observed spectrum was found to consist of well resolved proton hyperfine components and also to be perturbed by the Jahn-Teller effect. A Hamiltonian dealing with the Jahn-Teller effect, the fine structure interactions (spin-orbit and spin-rotation), and the hyperfine interaction has been derived for the analysis, which well explained the observed spectra including the previously observed LMR $results^{1}$.

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$^{1}$. D.K. Russell and H.E. Radford, J. Chem. Phys. 72, 2750 (1980).
Author Institution: Institute for Molecular Science, Okazaki 444

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