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Related to quinone: benzoquinone, quinine, hydroquinone


 (kwĭ-nōn′, kwĭn′ōn′)
1. Either of two isomeric unsaturated cyclic compounds having the formula C6H4O2, found widely in plants, especially in a yellow crystalline form, and used in making dyes, tanning hides, and photography.
2. Any of various quinonoid compounds, often yellow to red in color, many of which have biological derivation or importance, such as coenzyme-Q.


(kwɪˈnəʊn; ˈkwɪnəʊn)
(Elements & Compounds) another name for benzoquinone


(kwɪˈnoʊn, ˈkwɪn oʊn)

1. a yellow, crystalline, cyclic compound, C6H4O2, used chiefly in photography and in tanning leather.
2. any of a class of compounds of this type.
[1850–55; quin(ic acid) a compound found in cinchona bark and the leaves of other plants(quinic < Sp quin(a) quinine + -ic) + -one]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.quinone - any of a class of aromatic yellow compounds including several that are biologically important as coenzymes or acceptors or vitamins; used in making dyes
chemical compound, compound - (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
coenzyme Q, ubiquinone - any of several quinones found in living cells and that function as coenzymes that transfer electrons from one molecule to another in cell respiration
References in periodicals archive ?
The latest advance in the area of mitochondrial bioenergetics is the coenzyme pyrroloquinoline quinone or PQQ.
The quinone picks up a proton and moves across the membrane.
The chemical state of dopamine changes from a protonated hydroquinone in acidic media to an oxidized quinone in basic environments.
Pyrroloquinoline quinone (PQQ) functions as a cofactor for prokaryotic oxidoreductases, such as methanol dehydrogenase and glucose dehydrogenase.
Phase II detoxification enzymes (such as glutathione-S-transferases and quinone reductase), which are responsible for metabolizing the products of phase I metabolic reactions, degrade these reactive intermediates by conjugation or reduction reactions, thereby protecting cells from oxidative DNA damage.
But vitamin E quinone, a molecule that forms naturally when the vitamin reacts with oxygen in the body, proved a potent anticoagulant.
In fact, dopamine quinone reacts with DNA similarly to the E(1)(E(2))-3,4-Q, forming analogous depurinating N3Ade and N7Gua adducts.
Currently, PM seasonal and spatial distributions of outdoor PAH, aldehyde, and quinone concentrations are being characterized for 12 southern California communities participating in the CHS (Cho et al.
This reaction converts each phenol to a compound called a quinone.
Chapter 2: Modeling Properties and Reactivity of Quinone Methides by DFT calculations (Mauro Freccero and Filippo Doria).
Dopamine quinone formation and protein modification associated with the striatal neurotoxicity of methamphetamine: evidence against a role for extracellular dopamine.
Instead, quinhydrone, a 1:1 addition compound of hydroquinone and quinone is isolated in high yields (70-90%).