nephelauxeticadj.
/ˌnɛfəlɔːkˈsɛtɪk/, U.S. /ˈˌnɛfəlɑkˈsɛdɪk/, /ˈˌnɛfəlɔkˈsɛdɪk/ Chemistry.
Relating to or designating the effect of a ligand in causing expansion of the d-electron cloud of a transition metal ion in a complex, resulting in decreased separation of electron energy levels compared with the free ion. Chiefly in nephelauxetic series n. a series of ligands arranged in order of the magnitude of this effect.
ΘΚΠ
the world > matter > physics > atomic physics > particle physics > particle avoiding strong interaction > electron > [noun] > series of ligands
nephelauxetic series1958
the world > matter > physics > atomic physics > particle physics > particle avoiding strong interaction > electron > [adjective] > causing expansion of electron cloud
nephelauxetic1958
1958 C. Schäffer & C. K. Jørgensen in Jrnl. Inorg. & Nuclear Chem. 8 147 We shall propose to call this series the nephelauxetic (cloud expanding) series, as it corresponds to a development of the d shell in the region of the ligands. The neo-greek word was constructed by Professor Kaj Barr from the University of Copenhagen.
1965 Molecular Physics 10 7 The red shift of the ligand field bands in metal complexes with respect to the free ions has been explained..as being due to the nephelauxetic effect.
1966 C. S. G. Phillips & R. J. P. Williams Inorg. Chem. II. xxviii. 402 The nephelauxetic (cloud-expanding) series.., it is suggested, represents the spread of the electron away from its parent nucleus on increase of covalent character in the binding of a given cation.
1994 D. F. Shriver et al. Inorg. Chem. (ed. 2) xiv. 595 The nephelauxetic character of a ligand is different for electrons in t2g and eg orbitals.
This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022).
<
adj.1958