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Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/16549

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1974-WH-07.jpg 169.9Kb JPEG image Thumbnail of THE NORMAL MODES OF CYCLOPROPENONE

Creators: Tuazon, E. C.; Miller, Foil A.
Issue Date: 1974
Abstract: The C = C stretching frequencies of cyclopropenone and cyclopropenone-$d_{2}$ present [FIGURE] a puzzling problem. They are presumably the very intense and strongly polarized Raman bands at 1480 and 1409 $cm^{-1}$, respectively. These unusually low values are in sharp contrast to those observed when the substituents are methyl, chloro, of phenyl, for then the C = C frequencies are in the ``normal” range of $1620 - 1680 cm^{-1}$. The low values for H and D raise a question about the proper description of the normal mode involved in these cases. A normal coordinate analysis of cyclopropenone-$d_{0}$ and $-d_{2}$ has been carried out, and the potential energy distribution has been determined for each of the twelve normal modes of each molecule. The discussion will concentrate on the answer to the above problem.
URI: http://hdl.handle.net/1811/16549
Other Identifiers: 1974-WH-7
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