quinhydronen.

Brit.

/kwɪnˈhʌɪdrəʊn/, U.S.

/kwɪnˈhaɪˌdroʊn/

Forms: 1800s– kinhydrone, 1800s– quinhydrone.

Origin: A borrowing from German. Etymon: German Chinhydron.

Etymology: < German Chinhydron (J. Berzelius 1846, in Jahres-Bericht über die Fortschritte der Chemie u. Mineral. 1845 25 833) < China quina n. + Hydro- hydro- comb. form + -on -one suffix.

Chemistry.

A dark green crystalline substance which is a complex formed by benzoquinone and hydroquinone. Also: any similar complex formed by a quinone and another aromatic compound.Formula: C₆H₄O₂·C₆H₄(OH)₂.

ΘΚΠ

the world > matter > chemistry > organic chemistry > organic compounds > [noun] > cyclic compounds > named > quinones

quinhydrone1857

thymoïl1857

thymoïlol1857

thymoquinone1871

toluquinone1874

quinoid1907

1857 H. Watts tr. L. Gmelin Hand-bk. Chem. XI. 164 When kinhydrone is heated, it sublimes partly undecomposed, partly converted into yellow kinone.

1893 T. E. Thorpe Dict. Applied Chem. III. 340 Quinhydrones..the composition of which has not been established with certainty.

1908 Chem. Abstr. 2 104 In the reaction of α-hydronaphthoquinone with quinone, the former is oxidized to α-naphthoquinone and the latter reduced to hydroquinone, and these react to give the mixed quinhydrone.

1963 I. L. Finar Org. Chem. (ed. 4) I. xxvii. 670 Quinhydrones are a group of coloured substances formed from quinones and other aromatic compounds. Some are believed to be charge-transfer complexes.

1999 New Phytologist 144 134/2 Each electrode was checked before use with quinhydrone in pH 4 and 7 buffers (the reading for quinhydrone is 218 or 224 mV, respectively, at 25°C).

Compounds

quinhydrone electrode n. a device for measuring pH comprising an electrode (usually made of platinum) immersed in a test solution to which quinhydrone has been added, which has a potential dependent upon the pH of the solution.

ΘΚΠ

the world > matter > chemistry > chemical assay or analytical chemistry > [noun] > acetimetry > other analytical techniques > apparatus

alkalimeter1807

kalimeter1890

quinhydrone electrode1921

1921 E. Biilmann in Jrnl. Soc. Leather Trades' Chemists 5 27 In the quinhydrone electrode two hydrions disappear, and at the same time a mol. of quinone is hydrogenated to one of hydroquinone.

1969 H. Rossotti Chem. Applications Potentiometry viii. 92 The quinhydrone electrode can..be used as a probe for hydrogen ions in the acidity range 1 ≤ pH ≤8.

1992 Electroanal. 4 805 The third [potentiometric detector] employed a novel differential titration technique based on two quinhydrone electrodes.

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

单词	quinhydrone
释义	quinhydronen. Brit. /kwɪnˈhʌɪdrəʊn/, U.S. /kwɪnˈhaɪˌdroʊn/ Forms: 1800s– kinhydrone, 1800s– quinhydrone. Origin: A borrowing from German. Etymon: German Chinhydron. Etymology: < German Chinhydron (J. Berzelius 1846, in Jahres-Bericht über die Fortschritte der Chemie u. Mineral. 1845 25 833) < China quina n. + Hydro- hydro- comb. form + -on -one suffix. Chemistry. A dark green crystalline substance which is a complex formed by benzoquinone and hydroquinone. Also: any similar complex formed by a quinone and another aromatic compound.Formula: C₆H₄O₂·C₆H₄(OH)₂. ΘΚΠ the world > matter > chemistry > organic chemistry > organic compounds > [noun] > cyclic compounds > named > quinones quinhydrone1857 thymoïl1857 thymoïlol1857 thymoquinone1871 toluquinone1874 quinoid1907 1857 H. Watts tr. L. Gmelin Hand-bk. Chem. XI. 164 When kinhydrone is heated, it sublimes partly undecomposed, partly converted into yellow kinone. 1893 T. E. Thorpe Dict. Applied Chem. III. 340 Quinhydrones..the composition of which has not been established with certainty. 1908 Chem. Abstr. 2 104 In the reaction of α-hydronaphthoquinone with quinone, the former is oxidized to α-naphthoquinone and the latter reduced to hydroquinone, and these react to give the mixed quinhydrone. 1963 I. L. Finar Org. Chem. (ed. 4) I. xxvii. 670 Quinhydrones are a group of coloured substances formed from quinones and other aromatic compounds. Some are believed to be charge-transfer complexes. 1999 New Phytologist 144 134/2 Each electrode was checked before use with quinhydrone in pH 4 and 7 buffers (the reading for quinhydrone is 218 or 224 mV, respectively, at 25°C). Compounds quinhydrone electrode n. a device for measuring pH comprising an electrode (usually made of platinum) immersed in a test solution to which quinhydrone has been added, which has a potential dependent upon the pH of the solution. ΘΚΠ the world > matter > chemistry > chemical assay or analytical chemistry > [noun] > acetimetry > other analytical techniques > apparatus alkalimeter1807 kalimeter1890 quinhydrone electrode1921 1921 E. Biilmann in Jrnl. Soc. Leather Trades' Chemists 5 27 In the quinhydrone electrode two hydrions disappear, and at the same time a mol. of quinone is hydrogenated to one of hydroquinone. 1969 H. Rossotti Chem. Applications Potentiometry viii. 92 The quinhydrone electrode can..be used as a probe for hydrogen ions in the acidity range 1 ≤ pH ≤8. 1992 Electroanal. 4 805 The third [potentiometric detector] employed a novel differential titration technique based on two quinhydrone electrodes. This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022). < n.1857
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