Infrared Spectrophotometric Study of Some Hydroxyanthraquinones and Their Sodium Salts

Abstract

The infrared spectra of some hydroxyanthraquinones and their sodium salts are investigated in the NaCl region. The spectra of the sodium salts indicate that only mono- and disodium salts can be obtained, when the molecule contains more than two OH-groups. The overlap of molecular orbitals of the C=O and C=C systems and the intramolecular charge transfer increases in the ionic species.

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