nitroxiden.

Brit.

/nʌɪˈtrɒksʌɪd/, U.S.

/naɪˈtrɑkˌsaɪd/

Origin: Formed within English, by compounding. Etymons: nitro- comb. form, oxide n.

Etymology: < nitro- comb. form + oxide n.

Chemistry.

†1. nitroxide of mercury, mercuric oxide that has been prepared using nitric acid. Obsolete. rare.

ΚΠ

1818 W. Henry Elements Exper. Chem. (ed. 8) II. i. xix. 94 This substance, commonly called red precipitate, is termed more properly the nitroxide of mercury.

2. The free radical N—O·; (also) any of a class of relatively stable free radicals containing this group, RR′N—O·, which are used esp. as spin-labels in electron spin resonance. Also called nitroxyl.

ΘΚΠ

the world > matter > chemistry > elements and compounds > metals > specific elements > nitrogen > [noun] > compounds

nitrous ether1791

nitruret1794

azoturet1819

azotane1827

nitride1850

hyponitric acid1854

nitryl1864

azotine1884

nitro-metal1895

tetrazone1895

trinitride1911

nitroxide1950

nitroxyl1969

1950 Chem. Abstr. 44 Index 12632/2 Nitroxide, bis(p-methoxyphenyl), (p-MeOC₆H₄)₂NO, magnetic absorption of.

1961 Jrnl. Amer. Chem. Soc. 83 4671/1 Although some substituted nitroxides are known, none of these contain groups attached to nitrogen which are incapable of delocalizing the odd electron.

1971 Synthesis 190/1 From the time of Wieland, nitroxyl radicals have usually been called nitroxides. This name was extended later to heteroatom-containing cyclic and non-cyclic radicals of a non-aromatic nature.

1989 H. G. Aurich in E. Brewer et al. Nitrones, Nitronates & Nitroxides iv. 315 There are, for example, nitroxides which have life-times of several years in the solid state. On the other hand, in solution some nitroxides exist for only a split second.

1993 New Scientist 12 June 15/3 Nitroxides are now known to have considerable therapeutic value.

This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022).

单词	nitroxide
释义	nitroxiden. Brit. /nʌɪˈtrɒksʌɪd/, U.S. /naɪˈtrɑkˌsaɪd/ Origin: Formed within English, by compounding. Etymons: nitro- comb. form, oxide n. Etymology: < nitro- comb. form + oxide n. Chemistry. †1. nitroxide of mercury, mercuric oxide that has been prepared using nitric acid. Obsolete. rare. ΚΠ 1818 W. Henry Elements Exper. Chem. (ed. 8) II. i. xix. 94 This substance, commonly called red precipitate, is termed more properly the nitroxide of mercury. 2. The free radical N—O·; (also) any of a class of relatively stable free radicals containing this group, RR′N—O·, which are used esp. as spin-labels in electron spin resonance. Also called nitroxyl. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > nitrogen > [noun] > compounds nitrous ether1791 nitruret1794 azoturet1819 azotane1827 nitride1850 hyponitric acid1854 nitryl1864 azotine1884 nitro-metal1895 tetrazone1895 trinitride1911 nitroxide1950 nitroxyl1969 1950 Chem. Abstr. 44 Index 12632/2 Nitroxide, bis(p-methoxyphenyl), (p-MeOC₆H₄)₂NO, magnetic absorption of. 1961 Jrnl. Amer. Chem. Soc. 83 4671/1 Although some substituted nitroxides are known, none of these contain groups attached to nitrogen which are incapable of delocalizing the odd electron. 1971 Synthesis 190/1 From the time of Wieland, nitroxyl radicals have usually been called nitroxides. This name was extended later to heteroatom-containing cyclic and non-cyclic radicals of a non-aromatic nature. 1989 H. G. Aurich in E. Brewer et al. Nitrones, Nitronates & Nitroxides iv. 315 There are, for example, nitroxides which have life-times of several years in the solid state. On the other hand, in solution some nitroxides exist for only a split second. 1993 New Scientist 12 June 15/3 Nitroxides are now known to have considerable therapeutic value. This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022). < n.1818
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