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Journal of the Southern African Institute of Mining and Metallurgy

On-line version ISSN 2411-9717

Abstract

STEYN, M.; VISSER, H.G.  and  ROODT, A.. Evaluation of oxine-type ligand coordination to zirconium (IV). J. S. Afr. Inst. Min. Metall. [online]. 2013, vol.113, n.2, pp. 105-108. ISSN 2411-9717.

[Zr(C9H6NO)4]-(HCON(CH3)2)-(H2O), where (C9H6NO) = 8-hydroxy quinoline (oxH), was synthesized and characterized. This tetrakis-coordinated zirconium complex crystallized in the triclinic crystal system (PT, Z=2) along with water and N,N'-dimethylformamide (DMF) solvate in the asymmetric unit. The metal atom is surrounded by four N,O-donating bidentate ox-ligands that are arranged around the metal centre to give a square antiprismatic coordination polyhedron with a small distortion towards a dodeca-hedral geometry. Crystal packing is stabilized by intermolecular interactions of adjacent oxine ring systems in neighbouring molecules, as well as hydrogen bonding of the aqua and DMF solvate molecules, linking the molecular entities into a supramol-ecular three-dimensional network.

Keywords : zirconium; tetrakis coordination; quinolinato.

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