Acta Cryst. (2009). E65, m842-m843  [ doi:10.1107/S1600536809023824 ]

Chlorido[(E)-2-hydroxy-6-(isonicotinoylhydrazonomethyl)phenyl]mercury(II) monohydrate

S.-Z. Bai, X.-H. Lou, H.-M. Li and H. Shi

Abstract: The asymmetric unit of the title compound, [Hg(C₁₃H₁₀N₃O₂)Cl]·H₂O, contains two independent mercury(II) complexes with slightly different conformations, related via a pseudo-inversion centre, and two water molecules. The Hg^II atoms show a typical linear geometry to a C atom of the benzene ring and to a Cl atom. A benzene C and the azomethine N atom chelate the Hg^II atoms with weak intramolecular HgN bonding distances of 2.735 (3) and 2.739 (3) Å, respectively. The resulting five-membered metallacycles are nearly coplanar with the benzene rings [dihedral angles = 0.9 (1) and 0.7 (1)°], while the pyridine rings make dihedral angles with the benzene units of 58.17 (1) and 56.58 (1)°. In the crystal structure, the Hg^II complexes are linked by hydroxy donor and pyridine acceptor groups into chains along [010]. The water molecules connect the complexes through intermolecular O-HO_carbonyl bonds in the a-axis direction, and the azomethine H atoms donate towards the water O atoms, forming a three-dimensional network of intermolecular O-HN, O-HO and N-HO hydrogen bonds.

Online 27 June 2009

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