quinonoidadj.n.

Brit.

/ˈkwɪnənɔɪd/, U.S.

/ˈkwɪnəˌnɔɪd/

Origin: Formed within English, by derivation. Etymons: quinone n., -oid suffix.

Etymology: < quinone n. + -oid suffix.

Chemistry.

A. adj.

Of the nature of, resembling, or characteristic of a quinone; having a molecular structure derived from or resembling that of quinone.

ΘΚΠ

the world > matter > chemistry > organic chemistry > organic compounds > [adjective] > cyclic compounds > quinones

quinonoid1878

quinoid1894

quinoidal1905

ubiquinone1958

1878 Chem. News 5 July 9/1 (heading) Quinonoid body found in a species of agaric.

1892 Proc. Chem. Soc. 8 101 It was maintained that in the case of azo-dyes, the rosanilines, methylene-blue, &c., colour was conditioned by a quinonoid structure.

1908 Jrnl. Chem. Soc. 94 i. 806 The meaning of the term quinonoid must be widened to include substances..in which the quinonoid oxygen atom is displaced by a bivalent imine or hydrocarbon group.

1956 Nature 14 Jan. 79/2 The quinonoid product of the catecholase reaction..is an active oxidase in the cresolase reaction.

1988 L. Stryer Biochem. (ed. 3) xxi. 497 The Schiff base between the amino acid substrate and PLP, termed an aldimine, loses a proton from its α-carbon to form a quinonoid intermediate.

B. n.

A quinonoid compound.

ΚΠ

1915 A. P. Mathews Physiol. Chem. ix. 370 The color change is due probably to a rearrangement of the molecule to a colored form, probably a quinonoid, when in the salt form.

1957 Jrnl. Amer. Chem. Soc. 79 2940/1 Naphthols would be expected to give more stable quinonoids than phenols.

1996 W. S. Pierpoint in S. Doonan Protein Purification Protocols viii. 75 Alkaline conditions..will increase the auto-oxidation of dihydroxy phenols to quinonoids.

This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).

单词	quinonoid
释义	quinonoidadj.n. Brit. /ˈkwɪnənɔɪd/, U.S. /ˈkwɪnəˌnɔɪd/ Origin: Formed within English, by derivation. Etymons: quinone n., -oid suffix. Etymology: < quinone n. + -oid suffix. Chemistry. A. adj. Of the nature of, resembling, or characteristic of a quinone; having a molecular structure derived from or resembling that of quinone. ΘΚΠ the world > matter > chemistry > organic chemistry > organic compounds > [adjective] > cyclic compounds > quinones quinonoid1878 quinoid1894 quinoidal1905 ubiquinone1958 1878 Chem. News 5 July 9/1 (heading) Quinonoid body found in a species of agaric. 1892 Proc. Chem. Soc. 8 101 It was maintained that in the case of azo-dyes, the rosanilines, methylene-blue, &c., colour was conditioned by a quinonoid structure. 1908 Jrnl. Chem. Soc. 94 i. 806 The meaning of the term quinonoid must be widened to include substances..in which the quinonoid oxygen atom is displaced by a bivalent imine or hydrocarbon group. 1956 Nature 14 Jan. 79/2 The quinonoid product of the catecholase reaction..is an active oxidase in the cresolase reaction. 1988 L. Stryer Biochem. (ed. 3) xxi. 497 The Schiff base between the amino acid substrate and PLP, termed an aldimine, loses a proton from its α-carbon to form a quinonoid intermediate. B. n. A quinonoid compound. ΚΠ 1915 A. P. Mathews Physiol. Chem. ix. 370 The color change is due probably to a rearrangement of the molecule to a colored form, probably a quinonoid, when in the salt form. 1957 Jrnl. Amer. Chem. Soc. 79 2940/1 Naphthols would be expected to give more stable quinonoids than phenols. 1996 W. S. Pierpoint in S. Doonan Protein Purification Protocols viii. 75 Alkaline conditions..will increase the auto-oxidation of dihydroxy phenols to quinonoids. This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022). < adj.n.1878
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