Acta Cryst. (2007). E63, m2463-m2464  [ doi:10.1107/S1600536807041955 ]

Diaquachlorido(4-hydroxypyridine-2,6-carboxylato-³N,O,O')iron(III) 18-crown-6 dihydrate

G.-W. Zhou, A.-Q. Wu, M.-S. Wang, G.-C. Guo and J.-S. Huang

Abstract: In the title compound, [Fe(C₇H₃NO₅)Cl(H₂O)₂]·C₁₂H₂₄O₆·2H₂O or [Fe(HChel)Cl(H₂O)₂].(18-crown-6)·2H₂O, where H₃Chel is 4-hydroxypyridine-2,6-dicarboxylic (chelidamic) acid, the Fe^III atom exhibits a distorted octahedral geometry coordinated by two O atoms and one N atom from the tridentate chelidamate ligand, one Cl atom and two water molecules. O-HO hydrogen bonds from the coordinated water molecules to the O atoms of the crown ether form one-dimensional hydrogen-bonded chains with alternating [Fe(HChel)Cl(H₂O)₂] and 18-crown-6 units. The solvent water molecules lie between these chains, accepting O-HO hydrogen bonds from the hydroxyl groups of the chelidamate ligands, and forming O-HO hydrogen bonds with the noncoordinated O atoms of the carboxylate groups.

Online 1 September 2007

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