Color Reaction of Organic Compounds with Pentacyano-iron Complex Salts. VI

The Mechanism of Color Reaction of Phenols. (3). The Formation of Pentacyano-iron Complex Salts Containing p-Aminophenols as Ligand, and Indophenol Pigments

Abstract

Mechanism of color reaction of phenols by the reaction of pentacyano-iron complex like sodium nitroprusside and pentacyanoammineferroate, and hydroxylamine was examined by paper chromatography, paper electrophoresis, and absorption spectra. It was revealed that the chief product of this reaction is blue or green pentacyano-p-aminophenolf erroates. In the case of phenols with electron-releasing group, a part of the p-aminophenols formed by the reaction and unchanged phenols undergo autoxidative condensation to produce the indophenol-type dye as a by-product.