Oscillations of the methane molecule

Bhagavantam, S. (1932) Oscillations of the methane molecule Nature, 129 . p. 830. ISSN 0028-0836

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Official URL: http://www.nature.com/nature/journal/v129/n3266/ab...

Related URL: http://dx.doi.org/10.1038/129830b0

Abstract

From a consideration of the infra-red absorption data, Dennison assigned 1304, 1520, 3019, and 4217 as the fundamental frequencies of the methane molecule, the highest, 4217, representing a symmetric expansion of the tetrahedron. In the Raman spectrum of methane, however, 4217 fails to appear, and we have instead a frequency 2918 recorded as an intense and sharp line, which is inactive in infra-red absorption and is therefore to be identified with a symmetric oscillation of the tetrahedron. I have accordingly suggested in a recent paper that the fundamental frequencies of methane are 1304, 1520, 2918, and 3019, the frequency 4217 being merely a combination of the first and the third fundamentals.

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Deposited On:13 Dec 2010 08:34
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