Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy p. 199 - 204 (1981)
Update date:2022-09-26
Topics:
Goethals, G.
Nadio, L.
Uzan, R.
The carbonyl stretching frequencies of substituted 2-Me, 2,6-diMe, 2-MeO benzophenones and 2-Me, 2-MeO acetophenones have been measured in diluted CCl4 solutions.Two interaction mechanisms are observed.In X, Y substituted benzophenones with X on the same cycle as the ortho group and Y on the other cycle, it is shown that for X=Y, the effect of Y is greater than that of X except for very strong electron-releasing substituents.In this last case, the observed enhancement is attributed to the joint effects of intercycle interactions excercised on X and Y and of intracycle interaction on X.These results are corroborated by the study of substituted acetophenones in which only the intracycle mechanism can play a role.
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