quinone

quinone
1. General name for aromatic compounds bearing two oxygens in place of two hydrogens, usually in the para position; the oxidation product of a hydroquinone. 2. SYN: 1,4-benzoquinone (1).

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qui·none kwin-'ōn, 'kwin-. n
1) either of two isomeric cyclic crystalline compounds C6H4O2 that are extremely irritating to the skin and mucous membranes
2) any of various usu. yellow, orange, or red quinonoid compounds including several that are biologically important as coenzymes, hydrogen acceptors, or vitamins

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qui·none (kwiґnōn) (kwinґōn) any of a group of highly conjugated aromatic diketones, usually in the ortho or para configuration, derived from benzene or from multiple ring hydrocarbons such as anthracene or naphthalene; they are subclassified on the basis of ring structure (e.g., anthraquinone or benzoquinone), are mild oxidizing agents, and are usually colored yellow, red, or orange. The term is often used specifically to denote benzoquinone (q.v.), particularly 1,4-benzoquinone.

Medical dictionary. 2011.

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  • quinone — [ kinɔn ] n. f. • 1875; comp. sav. de quina, a. forme abrégée de quinquina ♦ Chim. Composé aromatique dans lequel deux atomes d hydrogène sont remplacés par deux atomes d oxygène. La quinone est un dérivé du benzène ou d hydrocarbures à noyaux… …   Encyclopédie Universelle

  • Quinone — Qui none, n. [Quinine + ketone.] (Chem.) A crystalline substance, {C6H4O2} (called also {benzoketone}), first obtained by the oxidation of quinic acid and regarded as a double ketone; also, by extension, any one of the series of which quinone… …   The Collaborative International Dictionary of English

  • quinone — [kwi nōn′, kwin′ōn΄] n. [ QUIN(IC ACID) + ONE] 1. either of two isomeric compounds, C6H4O2, especially the yellow, crystalline isomer used in making dyes 2. any of a series of compounds of this type …   English World dictionary

  • Quinone — DDQ redirects here. DDQ is also the former callsign of a TV station in Toowoomba, Queensland, Australia. Benzoquinone, or quinone is one of the two isomers of cyclohexadienedione. These compounds have the molecular formula C6H4O2.… …   Wikipedia

  • quinone — /kwi nohn , kwin ohn/, n. Chem. 1. a yellow, crystalline, cyclic unsaturated diketone, C6H4O2, formed by oxidizing aniline or hydroquinone: used chiefly in photography and in tanning leather. 2. any of a class of compounds of this type. Also,… …   Universalium

  • Quinone — Les quinones constituent une série de diènes plutôt que des composés aromatiques comportant un noyau de benzène sur lequel deux atomes d hydrogène sont remplacés par deux oxygènes formant deux liaisons carbonyles (dicétones éthylèniques… …   Wikipédia en Français

  • quinone — (ki non), s. m. ou QUINONE (ki non )), s. f. Terme de chimie. Radical composé qui est le produit de la distillation de l acide quinique …   Dictionnaire de la Langue Française d'Émile Littré

  • quinone — 1,4 benzchinonas statusas T sritis chemija formulė C₆H₄(=O)₂ atitikmenys: angl. p benzoquinone; quinone; 1,4 benzoquinone rus. n бензохинон; хинон; 1,4 бензохинон ryšiai: sinonimas – p benzchinonas sinonimas – 2,5 cikloheksadien 1,4 dionas… …   Chemijos terminų aiškinamasis žodynas

  • Quinone Outside Inhibitors — Les QoI, ou Quinone outside inhibitors sont un groupe de produits chimiques utilisés en agriculture. Les QoI sont des fongicides qui agissent comme inhibiteurs du site d oxydation du coenzyme Q situé sur la face externe du cytochrome b. Les QoI… …   Wikipédia en Français

  • Quinone-interacting membrane-bound oxidoreductase — is a membrane bound protein complex present in the electron transport chain of sulfate reducers (e.g. Desulfovibrio species) and some sulfur oxidizers (such as 0.014) …   Wikipedia

  • quinone diimine — ˈdīəˌmēn noun Etymology: diimine from di + imine 1. : a colorless crystalline compound HN . C6H4 . NH regarded as derived from quinone (sense 1a) by replacement of both oxygen atoms by imino groups but made by oxidation of para phenylenediamine… …   Useful english dictionary

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