Title

An Electrochemical Study of Redox Indicators : Part I. Substituted Chrysoidines

Document Type

Article

Language

eng

Format of Original

7 p.; 25 cm

Publication Date

5-1976

Publisher

Elsevier

Source Publication

Analytica Chimica Acta

Source ISSN

0003-2670

Original Item ID

doi: 10.1016/S0003-2670(01)82851-8; Shelves: QD 71 .A47 1976 v. 84, Memorial Periodicals

Abstract

The electrochemical oxidation of various substituted chrysoidines was studied by cyclic voltammetry, to determine which have stable oxidation products. Only 4-hydroxy-chrysoidine has a stable product; the apparent oxidation potential is 0.779 V vs. NHE. 4-Methoxy- and 4-ethoxy-chrysoidine rapidly lose methanol or ethanol, respectively, so that the 4-hydroxychrysoidine wave appears on subsequent scans. All the other chrysoidines studied are irreversible. The results indicate that a hydroxy group in the 4-position is necessary for stability; the 4-alkoxychrysoidines can achieve the stable quinoidal structure by cleavage of the alkoxy group after nucleophilic attack.

Comments

Analytica Chimica Acta, Vol. 84, No. 1 (May 1976): 165-171. DOI.