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The anodic oxidation of hydroquinone in acetonitrile. On the question of a possible one electron intermediate

✍ Scribed by Vernon D. Parker

Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
558 KB
Volume
18
Category
Article
ISSN
0013-4686

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✦ Synopsis

The oxidation of hydroquinone in acetonitrile takes place accompanied by the formation of two electron oxidation products as the first observable intermediates. In the presence of small amounts of added acid in acetonitrile the only observable product by rapid electrochemical techniques is monoprotonated benzoquinone. When voltammetry was conducted in the presence of only a neutral supporting electrolyte, the unprotonated quinone was observed as a transient product by rapid sweep cyclic voltammetry but undergoes reaction with anodically generated protons giving the protonated species observable by slow techniques. In the presence of 2,6-lutidine, only benzoquinone can be detected under either rapid or slow conditions. The validity of the above reaction scheme has been verified by cyclic voltammetry, coulometry with spectral analysis and rotating disk electrode voltammetry.

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