EFFECTS OF STRONGLY PERTURBATING AUXOCHROMES ON THE INTENSITY OF THE SECONDARY TRANSITION OF THE BENZENE CHOMOPHORE - THE PHENOLATE ANIONS

The Interaction Vector Model (IVM) is used to study the intensity of t he near UV transition of phenolates. Thirteen phenolates have been stu died using the phenolate anion as a reference. The modulus of the -O- double left right arrow -CH3 ortho interaction vector has been adapted to an unusual strong interaction. The pi donating effect of -O- tends to blur the smaller pi donating effect of the methyl substituents, an d tends to quench the effect on intensity of the methyl in the para po sition.