ELECTROCHEMICAL-BEHAVIOR OF 1,2-DIHYDROXYCYCLOBUTEN-3,4-DIONE IN DIMETHYL FORMAMIDE

Citation
G. Farnia et al., ELECTROCHEMICAL-BEHAVIOR OF 1,2-DIHYDROXYCYCLOBUTEN-3,4-DIONE IN DIMETHYL FORMAMIDE, Journal of electroanalytical chemistry [1992], 348(1-2), 1993, pp. 339-354
Citations number
24
Categorie Soggetti
Electrochemistry,"Chemistry Analytical
Journal title
Journal of electroanalytical chemistry [1992]
ISSN journal
15726657 → ACNP
Volume
348
Issue
1-2
Year of publication
1993
Pages
339 - 354
Database
ISI
SICI code
Abstract
The electrochemical behaviour of 1,2-dihydroxycyclobuten-3,4-dione (sq uaric acid, H2SQ) in dimethylformamide was investigated. On a Pt elect rode, the reduction involves two successive, chemically reversible, on e-electron processes, affording hydrogen and the basic species HSQ- an d SQ2- respectively. The oxidation of SQ2- thus formed occurs in two c onsecutive, chemically reversible, one-electron steps, affording the r adical anion SQ.- and the neutral species SQ-degrees; the neutral spec ies SQ-degrees is stable in the time-scale of the voltammetric experim ents only. In contrast, the chemically irreversible oxidations of H2SQ and HSQ- appear as more complicated processes. The oxidation of hydro gen in the presence of the electrogenerated basic species was also stu died. A comparison with the results obtained on an Hg electrode is mad e and the occurrence of a different voltammetric behaviour, as regards the reduction process, is discussed briefly.