Abstract

The internal chemical shifts of six aromatic molecules (C 6H 5X, X=NO 2, NH 2,F,Cl,Br,I) were determined in ten different solvents, by using mixtures of these molecules which were specifically labeled with deuterium. The internal chemical shifts showed a good linear relationship with the dielectric function formulated by the reaction field theory over a wide range of dielectric constant. Although the results obtained were generally in poor quantitative agreement with the reaction field theory, indicating that the effects of other specific solute solvent interactions are not entirely cancelled out by internal referencing technique, they appear to support the basic validity of the reaction field theory.

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