Semiquinone

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Science and technology

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What Wikipedia says

Semiquinones (or ubisemiquinones, if their origin is ubiquinone) are free radicals resulting from the removal of one hydrogen atom with its electron during the process of dehydrogenation of a hydroquinone, such as hydroquinone itself or catechol, to a quinone or alternatively the addition of a single hydrogen atom with its electron to a quinone.

Excerpt from the Wikipedia article “Semiquinone”, under the CC BY-SA 4.0 license. Read the article on Wikipedia