MICROWAVE SPECTRA OF $^{18}$O-TROPOLONE AND D-TROPOLONE

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Title: MICROWAVE SPECTRA OF $^{18}$O-TROPOLONE AND D-TROPOLONE
Creators: Lin, Wei; Pringle, Wallace C.; Novick, Stewart E.; Blake, Thomas A.; Keske, John C.; Plusquellic, D. F.
Issue Date: 2005
Publisher: Ohio State University
Abstract: Tropolone is a seven-membered ring with an intramolecular hydrogen bond between the hydroxyl proton on C$_1$ and the carbonyl oxygen on C$_2$. The proton tunnels between the two neighboring oxygen atoms. Microwave spectra of singly-substituted $^{18}$O-tropolone and of singly-deuterated tropolone were measured to determine the effect of these two substitutions on the proton tunneling dynamics. The 0$^+$ state of $^{18}$O-tropolone and both the 0$^+$ and 0$^-$ states of D-tropolone were observed and assigned. Analysis of the spectra reveals complete quenching of the tunneling splitting of $^{18}$O-tropolone. The energy separation between the 0$^+$ and 0$^-$ states in D-tropolone was determined and is found to be significantly smaller than that of normal tropolone.
Description: Author Institution: Department of Chemistry, Wesleyan University, Middletown, CT 06459; Pacific Northwest National Laboratory, Richland, WA 99352 (PNNL is operated for the US Department of Energy by the Battelle Memorial Institute under contract DE-AC05-76RLO 1830); Optical Technology Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8441
URI: http://hdl.handle.net/1811/30401
Other Identifiers: 2005-RC-02
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