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Related to Quinone: benzoquinone, quinine, hydroquinone


(organic chemistry)
CO(CHCH)2CO Yellow crystalline compound with irritating aroma; melts at 116°C; soluble in alcohol, alkalies, and ether; used to make dyes and hydroquinone. Also known as benzoquinone; chinone.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



any one of a class of cyclic diketones in which both carbonyl (C=O) groups are in a system of conjugated double bonds. Quinones are obtained in the form of colored crystals, which have a sharp odor. For example, para-benzoquinone (I), with a melting point of 116°C, and 1,4-naphthoquinone (II), with a melting point of 128.5°C, are yellow, while ortho-benzoquinone (III), with a melting point of 70°–80°C (with decomposition), and anthraquinone are red (seeANTHRAQUINONE).

Various pigments in nature are derivatives of quinones; for example, muscapharin, the dye substance of the fly agaric, is a derivative of para-benzoquinone. Quinones are readily reduced to yield diatomic phenols [for example, in industry, hydroquinone is obtained from (I) in this way]. They actively enter in diene synthesis,

as well as form molecular complexes with phenols. They are used in analytical chemistry.

Quinones are obtained by several methods, including the oxidation of the aromatic hydrocarbons or of their hydroxy or amino derivatives; for example, (I) is obtained by the oxidation of aniline, while (II) and anthraquinone are obtained by the oxidation of naphthalene and anthracene, respectively. Quinones and their derivatives are intermediate products in the production of dyes (seeANTHRAQUINONE DYES). They are also used as fungicides, insecticides, and tanning agents. 2-Methyl-1,4-naphthoquinone is a vitamin of the vitamin K group.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
After his posts exploded on Facebook, Quinones messaged Mobo to apologize and offered to return the dress, which the designer accepted.
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Within minutes of her response, the group made clear it was not satisfied, and White told reporters afterward that Quinones deserved a better answer.
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Speaking of the incident, Russ Gibson, Osceola County Sheriff said: "Even after accused hit team Alexis Ramos and Glorianmarie Quinones Montes realized they had the wrong woman, they still continued with their plan of murder," the (https://nypost.com/2018/01/13/hired-killers-allegedly-targeted-wrong-woman-and-killed-her-anyway/) New York Post reported .
Robert Goffner, who lost in the A quarterfinals, reached the B singles final and gave top-seeded Luis Quinones all he could handle.