zerovalentadj.
/zɪərəʊˈveɪlənt/, U.S. /ˌzɪroʊˈveɪlənt/, /ˌziroʊˈveɪlənt/ Chemistry.
Of an element: having a full outer valence level (and hence a valency of zero); (of a compound or complex) containing an element in this state. Also: of or relating to the condition of having a valency of zero.
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the world > matter > chemistry > valency > [adjective] > having a valency of zero
zerovalent1906
non-valent1950
1906 J. P. Iddings Rock Minerals i. 6 (table) It is headed by the rare elements which are not known in chemical combination and are said to have no valence... Zero valent: A, He.
1965 Jrnl. Chem. Soc. 847 The analogous reaction..of the naphthalene complex in its zerovalent formulation..cannot be distinguished from the possible consecutive reactions.
1977 Inorg. Chem. 16 1313 (heading) Reactions of the zerovalent complex Ni[HP(C6H5)2]4.
1984 Science 22 June 1330/2 A greater proportion of nickel in the catalytically active zero-valent state.
2006 Water Environment Res. 78 85/1 Zerovalent iron materials have been shown to be effective for removing some regulated metal ions, including chromate.
This entry has been updated (OED Third Edition, June 2018; most recently modified version published online March 2022).
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