quinonen.
/ˈkwɪnəʊn/, /kwɪˈnəʊn/, U.S. /ˈkwɪˌnoʊn/, /kwᵻˈnoʊn/ Chemistry.
= benzoquinone n. at benzo- comb. form Additions. In later use also: any of a series of aromatic compounds derived from benzene and its homologues in which two methene (CH) groups are replaced by two ketone (CO) groups.Quinones are cyclohexadienones.
ΚΠ
1852 H. Watts tr. L. Gmelin Hand-bk. Chem. VII. 145 Hydrosulphuric acid..converts Chinone, C12H4O4, into Hydrochinone, C12H6O4.
1857 W. A. Miller Elements Chem. III. 353 When kinone [1862 quinone] is treated with reducing agents.
1885 I. Remsen Introd. Study Compounds of Carbon 306 The quinones are peculiar bodies which in some ways are allied to the ketones.
1906 H. J. H. Fenton Notes Qualitative Anal. (new ed.) 129 Quinone crystallises in golden yellow prisms.
1934 C. C. Steele Introd. Plant Biochem. vi. xvii. 180 Quinone is..obtained by the oxidation of quinic acid from cinchona bark.
1960 F. G. Mann & B. C. Saunders Pract. Org. Chem. (ed. 4) ii. 252 Quinones may often be prepared by direct oxidation of the corresponding hydrocarbon: thus anthracene (A) on oxidation gives anthraquinone (B) whilst phenanthrene (C) gives phenanthraquinone (D).
1995 New Scientist 23 Dec. 69/1 When threatened, the bombardier beetles of the book's title rapidly synthesise a mixture of highly irritant quinones.
Derivatives
ˈquinone-like adj.
ΚΠ
1884 Bull. Torrey Bot. Club 11 94 Further investigation showed this yellow pigment to be a hitherto undescribed quinone-like substance, which Herr Rossoll has named ‘helichrysin’.
1992 Electroanal. 4 889 The hydroxylamine derivative formed in these reductions can be dehydrated and yields an easily reducible, quinone-like ketimine.
This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).
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