Document Type

Article

Language

eng

Format of Original

7 p.; 23-29 cm

Publication Date

1980

Publisher

Electrochemical Society

Source Publication

Journal of the Electrochemical Society

Source ISSN

0013-4651

Original Item ID

Shelves: TP 250 .E542 1980 v. 127, Raynor Memorial Periodicals; doi: 10.1149/1.2129936

Abstract

The oxidation of substituted catechols was studied by cyclic voltammetry, chronoamperometry, rotating ring‐disk electrode, and coulometry. The results showed that the quinones that were formed from the oxidation of substituted catechols reacted with the basic forms of the starting material to yield the dimeric product. These products were generally unstable and rapidly polymerized or underwent some other irreversible reaction to form an electroinactive product. For 3,4‐dihydroxyacetophenone and propriophenone, the intermediate was stable long enough to be observed in cyclic voltammetry. The rate of the coupling reaction was found to correlate well with the Hammett ρ‐σ parameters and indicated that there was substantial negative charge in the transition state. Finally, an analysis of the coulometric n‐values along with the iat1/2/C values indicated that the initial coupling product was a diphenyl ether. Analysis of the coulometry products showed extensive polymerization.

Comments

Published version. Journal of the Electrochemical Society, Vol. 127, No. 7 (1980): 1489-1495. DOI. © Electrochemical Society 1980. Used with permission.

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