ABSTRACT
Semiquinones are relatively stable free radicals formed by one-electron reduction of quinones or by one-electron oxidation of quinols. Thus, in alkaline media, the 1,4-benzo-semiquinone radical anion ( https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781351073035/832a9eb9-8449-4860-be35-1e22a6a0a5a0/content/inequintro_1_1.tif"/> ) appears as an intermediate in the process
