The Polarography of the Monoximes and Dioximes of Benzoquinone, Naphthoquinone, and Anthraquinone

Abstract

The polarographic behavior of the monoximes and dioximes of 1,4-benzoquinone, 1,4-naphthoquinone, l,2-naphthoquinone, and 9,lO-anthraquinone has been investigated in the pH range 3 t o 14. All of the compounds produce welldefined polarographic reduction waves which can be used for analytical purposes. Polarographic evidence indicates that the monoximes and the dioximes exhibit tautomerism.

Voltammetric Behavior of the System Nitrosobenzene-Phenylhydroxylamine at the Graphite Electrode.

“…d This wave is caused by nitrosobenzene formed on rapid and complete oxidation of phenylhydroxylamine. Em = 0.339 -0.0584 pH (3) and in 52% ethanol solution (pH 6 to 13) Em = 0.323 -0.0603 pH (4) These data are also in accord with the standard potential of 0.582 volt vs. N.H.E. (0.337 volt vs.…”

Investigation of the Electrochemical Characteristics of Organic Compounds

“…Of particular interest is p-quinonedioxime which has a theoretical capacity of 69.9 amp-min/g and which operates under these conditions of discharge at an electrode efficiency of 93.3%. On the basis of these results and the polarographic data of Elofson and Atkinson (16) it is believed the over-all reduction of p-quinonedioxime takes place with a 6 electron change, the actual reduction probably proceeding through the intermediate diimino stage as shown here:…”

The chelate formation of thorium with 1, 2-naphthoquinone, 1- oxime

“…All of the compounds produce well defined polarographic reduction waves which can be used for analytical purposes. Polarographic evidence indicates that the monoximes and the dioximes exhibit tautomerism (5). Ab initio, Hartree-Fock and Density Functional Theoretical study of vibrational spectra of zirconium chelate of 1, 2-naphthoquinone-1, oxime have been reported by G. S. Jagtap et.al.…”