Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy p. 2177 - 2188 (1994)
Update date:2022-08-04
Topics:
Vrielynck, L.
Cornard, J. P.
Merlin, J. C.
Lautie, M. F.
The infrared solid state, Raman solid state and tetrachloride solution spectra of flavone have been obtained.Assignments of most of the vibrational data have been performed by comparison between the spectra of flavone and three isotopic species, deuterated on the A, B and C rings, respectively.The vibrational frequencies for all the investigated compounds have been calculated from the conformational analysis of flavone using the semi-empirical AM1 method and compared with experimental values.The correlation is more or less satisfactory; however, for some vibrational modes, the calculated isotopic shifts agree better with experiment than do the frequencies themselves.Specific vibrational modes which retain a benzene ring mono-substituted and ortho-distributed character have been recognized in the spectra, according to literature data, isotopic frequency shifts and graphic representation of the atomic displacements.
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