Editing Quinone (section)

==Properties==
Quinones are oxidized derivatives of aromatic compounds and are often readily made from reactive aromatic compounds with [[electron-donating group|electron-donating substituents]] such as [[phenols]] and [[catechol]]s, which increase the nucleophilicity of the ring and contributes to the large [[redox potential]] needed to break aromaticity. (Quinones are conjugated but not aromatic). Quinones are electrophilic [[Michael acceptor]]s stabilised by conjugation. Depending on the quinone and the site of reduction, reduction can either rearomatise the compound or break the conjugation. [[Conjugate addition]] nearly always breaks the conjugation.

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File:orthobenzoquinone.svg|[[1,2-Benzoquinone]]
File:P-Benzochinon.svg|[[1,4-Benzoquinone]]
File:1,4-Naphthoquinone.svg|[[1,4-Naphthoquinone]]
File:Anthrachinon.svg|[[anthraquinone|9,10-Anthraquinone]]
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The term '''quinone''' is also used more generally for a large class of compounds formally derived from aromatic quinones through replacement of some [[hydrogen]] atoms by other atoms or radicals.

<gallery  class="skin-invert-image">>
File:2,3,5,6-tetrachloro-parabenzoquinone.svg|[[Chloranil]], a reagent in organic chemistry
File:HNQ.svg|[[Lawsone]], a dye present in the leaves of the henna plant
File:Alizaryna.svg|[[Alizarin]], a common red dye
File:Dichlorodicyanobenzoquinone.svg|[[2,3-Dichloro-5,6-dicyano-1,4-benzoquinone|DDQ]], a reagent in organic chemistry
File:Daunorubicin2DACS.svg|[[Daunorubicin]], an anticancer drug
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