MILLIMETER WAVE SPECTRA AND CENTRIFUGAL STRETCHING CONSTANTS OF THE METHYL $HALIDES^{*}$

Orville-Thomas, W. J.; Cox, J. T.; Gordy, Walter

MILLIMETER WAVE SPECTRA AND CENTRIFUGAL STRETCHING CONSTANTS OF THE METHYL $HALIDES^{*}$

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Date

1954

Authors

Orville-Thomas, W. J.

Cox, J. T.

Gordy, Walter

Publisher

Ohio State University

Abstract

The extension of the workable millimeter wave region1 has made possible measurements of high J transitions in the methyl halides, where centrifugal distortion displacements of rotational lines amount to many megacycles. High J transitions of these substances have been measured for a more accurate evaluation of the distortion constants. The new $D J$ value for $C H 3 C l 35,18.1±0.5$ Kc, is in good agreement with the value 18.4 Mc, theoretically predicted by Chang and $D e n n i s o n . 2$ Earlier $m e a s u r e m e n t s 3$ on lower J transitions gave $D J J =26.4$ Kc, while recent infrared measurements gave an estimated $D J J =24 K c . 4$

Description

$*$ Supported by a contract with the United States Air Force. $∗∗$ Visiting Fulbright Scholar, 1953-54. On Sabbatical leave from Edward Davies Chemical Laboratories, University College of Wales, ABERYSTWYTH. $1$ W. C. King and W. Gordy, Phys. Rev. 90:319 (1953) $2$ Tsu-Shen Chang and D. M. Dennison, J. Chem. Phys. 21:1293 (1953) $3$ J. W. Simmons and W. E. Anderson, Phys. Rev. 80:338 (1950) $4$ J. Pickworth and H. W. Thompson, Trans. Faraday Soc. 50:218, (1954)

Author Institution: Department of Physics, Duke University

URI

http://hdl.handle.net/1811/7268

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Abstracts of OSU International Symposium on Molecular Spectroscopy 1946-1959

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