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).

* * *

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

* * *

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.

Look at other dictionaries:

  • 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 — noun Etymology: International Scientific Vocabulary quinine + one Date: 1853 1. either of two isomeric cyclic crystalline compounds C6H4O2 that are derivatives of benzene 2. any of various usually yellow, orange, or red quinonoid compounds… …   New Collegiate Dictionary

  • quinone — Aromatic dicarbonyl compound derived from a dihydroxy aromatic compound. Ubiquinone (coenzyme Q) is a dimethoxy dicarbonyl derivative of benzene involved in electron transport. Other quinones may act as tanning agents …   Dictionary of molecular biology

  • quinone — noun any of a class of aromatic compounds having two carbonyl functional groups in the same six membered ring …   Wiktionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.