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dc.creatorBauman, Robert P.en_US
dc.date.accessioned2006-06-15T12:42:17Z
dc.date.available2006-06-15T12:42:17Z
dc.date.issued1954en_US
dc.identifier1954-H-5en_US
dc.identifier.urihttp://hdl.handle.net/1811/7267
dc.description$^{1}$E. Teller and B. Topley, J. Chem. Soc. 1935, 885 $^{2}$ J. B. Howard, J. Chem. Phys. 5:442 (1937)en_US
dc.descriptionAuthor Institution: Mellon Instituteen_US
dc.description.abstractExamination of the infrared and Raman spectra of dimethyl acetylene and perfluorodimethyl acetylene (hexafluoro-2-butyne) suggested a re-examination of the selection rule arguments for freely rotating ethane-type molecules. Teller and $Topley^{1}$ originally assumed $D_{3}$ selection rules for freely rotating ethane. $Howard^{2}$ later showed that the degenerate species is split by the higher symmetry of the potential field. Because he used a plane of symmetry ($\sigma_{h}$) as the additional symmetry element, he called the new selection rules $D_{3{h}}$. Howard had also pointed out, however, that a center of symmetry (i) could have been used as the additional element. This would lead to $D_{3{d}}$ selection rules rather than $D_{3{h}}$. Although these groups were equivalent for Howard’s work, they produce significant differences in the Raman spectrum and in infrared combination tones. The selection rules followed by a freely rotating ethane-type molecule are shown to be those of the point group $D_{3{d}}$.en_US
dc.format.extent100506 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoenen_US
dc.publisherOhio State Universityen_US
dc.titleSELECTION RULES FOR FREELY ROTATING ETHANE-TYPE MOLECULESen_US
dc.typearticleen_US


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