Acta Cryst. (2009). E65, m1559-m1560  [ doi:10.1107/S1600536809046923 ]

Tetraaquatetrakis{₃-3,3'-[(E,E)-ethane-1,2-diylbis(nitrilomethylidyne)]benzene-1,2-diolato}octazinc(II) N,N-dimethylformamide hexasolvate

Q.-J. Xu, L.-R. Lin, D. Sun, R.-B. Huang and L.-S. Zheng

Abstract: The asymmetric unit of the title compound [Zn₈(C₁₆H₁₂N₂O₄)₄(H₂O)₄]·6C₃H₇NO, consists of eight Zn^II cations, four tetravalent anionic ligands, L^4- (L^4- = 3,3'-(1E,1'E)-(ethane-1,2-diylbis(azan-1-yl-1-ylidene))bis(methan-1-yl-1-ylidene)dibenzene-1,2-bis(olate), four coordinated water molecules and six N,N-dimethylformamide solvate molecules. The coordination complex comprises an octanuclear Zn^II unit with its Zn^II centers coordinated in two discrete distorted square-pyramidal geometries. Four Zn^II atoms each coordinate to two nitrogen atoms and two phenolate oxygen atoms from an individual L^4- ligand and one coordinated water molecule. The other four Zn^II atoms each bind to five phenolate oxygen atoms from three different L^4- ligands. In the crystal structure, the Zn^II complex unit, coordinated water molecules and dimethylformamide solvate molecules are linked via O-HO and C-HO hydrogen bonds. Molecules are connected by additional intermolecular O-HO and C-HO hydrogen bonds, forming an extensive three dimensional framework.

Online 11 November 2009

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