homonuclearadj.

/hɒməʊˈnjuːklɪə/

Etymology: < homo- comb. form + nuclear adj.

a. Physics and Chemistry. Of a molecule: composed of atoms whose nuclei are alike, i.e. atoms of the same element or (more strictly) the same isotope.

ΘΚΠ

the world > matter > chemistry > atomic chemistry > [adjective] > relating to molecules > by nature of nucleus

heteronuclear1930

homonuclear1930

the world > matter > physics > atomic nucleus > radioactive isotope > [adjective] > composed of similar atoms

homonuclear1930

1930 Physical Rev. 36 617 In the case of homonuclear molecules (molecules composed of atoms whose nuclei are identical in charge and mass), any electron state may be either ‘odd’ or ‘even’.

1970 Nature 25 Apr. 354/1 Vibrational levels of N⁺₂, like those of N₂, are metastable because both molecules are homonuclear.

b. Chemistry. Taking place on the same ring in a molecule.

ΘΚΠ

the world > matter > chemistry > atomic chemistry > [adjective] > relating to molecules > organization of

intramolecular1884

infra-molecular1899

heteronuclear1900

isonuclear1900

homonuclear1938

1938 G. H. Richter Textbk. Org. Chem. xxix. 596 In discussing the reactions of naphthalene it is customary to speak of homonuclear substitution if the groups are entering the same ring, and heteronuclear substitution if the radicals are entering different rings.

1951 I. L. Finar Org. Chem. xxix. 586 Substitution products of naphthalene... When OH..or NH·CO·CH₃ is in the 2-position, homonuclear substitution usually takes place in the 1-position.

This entry has not yet been fully updated (first published 1976; most recently modified version published online June 2018).

单词	homonuclear
释义	homonuclearadj. /hɒməʊˈnjuːklɪə/ Etymology: < homo- comb. form + nuclear adj. a. Physics and Chemistry. Of a molecule: composed of atoms whose nuclei are alike, i.e. atoms of the same element or (more strictly) the same isotope. ΘΚΠ the world > matter > chemistry > atomic chemistry > [adjective] > relating to molecules > by nature of nucleus heteronuclear1930 homonuclear1930 the world > matter > physics > atomic nucleus > radioactive isotope > [adjective] > composed of similar atoms homonuclear1930 1930 Physical Rev. 36 617 In the case of homonuclear molecules (molecules composed of atoms whose nuclei are identical in charge and mass), any electron state may be either ‘odd’ or ‘even’. 1970 Nature 25 Apr. 354/1 Vibrational levels of N⁺₂, like those of N₂, are metastable because both molecules are homonuclear. b. Chemistry. Taking place on the same ring in a molecule. ΘΚΠ the world > matter > chemistry > atomic chemistry > [adjective] > relating to molecules > organization of intramolecular1884 infra-molecular1899 heteronuclear1900 isonuclear1900 homonuclear1938 1938 G. H. Richter Textbk. Org. Chem. xxix. 596 In discussing the reactions of naphthalene it is customary to speak of homonuclear substitution if the groups are entering the same ring, and heteronuclear substitution if the radicals are entering different rings. 1951 I. L. Finar Org. Chem. xxix. 586 Substitution products of naphthalene... When OH..or NH·CO·CH₃ is in the 2-position, homonuclear substitution usually takes place in the 1-position. This entry has not yet been fully updated (first published 1976; most recently modified version published online June 2018). < adj.1930
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