Crystal Structure of Monoprotonated Ni(II) Nitrilotriacetate Tetrahydrate

Author： Petrenko P. A. Gdaniec M. Simonov Yu. A. Stavila V. G. Gulea A. P.

ISSN： 1070-3284

Source： Russian Journal of Coordination Chemistry, Vol.30, Iss.11, 2004-11, pp. : 813-817

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Abstract

A Ni(II) complex of the composition Ni(HNta) · 4H₂O (I) was synthesized. Its structure was found to consist of neutral mononuclear [Ni(HNta)(H₂O)₃] complexes and crystallization water molecules. The Ni atom has octahedral surrounding and is coordinated to tridentate-chelate HNta^2– ligand through the N atom and O atoms of two deprotonated acetate groups and through the O atoms of three water molecules. The structure of I was compared with those of the Zn(HNta) · 4H₂O and Co(HNta) · 4H₂O complexes isostructural to I. Thermogravimetric method showed that the decomposition of compound I occurs through several successive stages of dehydration, deaquation, decarboxylation, and the formation of inorganic residue.