Acta Cryst. (2012). C68, m259-m264 [ doi:10.1107/S0108270112034567 ]
Abstract: The title compounds, tris(1,10-phenanthroline-2N,N')iron(II) bis(2,4,5-tricarboxybenzoate) monohydrate, [Fe(C12H8N2)3](C10H5O8)2·H2O, (I), and tris(2,2'-bipyridine-2N,N')iron(II) 2,5-dicarboxybenzene-1,4-dicarboxylate-benzene-1,2,4,5-tetracarboxylic acid-water (1/1/2), [Fe(C10H8N2)3](C10H4O8)·C10H6O8·2H2O, (II), were obtained during an attempt to synthesize a mixed-ligand complex of FeII with an N-containing ligand and benzene-1,2,4,5-tetracarboxylic acid via a solvothermal reaction. In both mononuclear complexes, each FeII metal ion is six-coordinated in a distorted octahedral manner by six N atoms from three chelating 1,10-phenanthroline or 2,2'-bipyridine ligands. In compound (I), the FeII atom lies on a twofold axis in the space group C2/c, whereas (II) crystallizes in the space group P21/n. In both compounds, the uncoordinated carboxylate anions and water molecules are linked by typical O-HO hydrogen bonds, generating extensive three-dimensional hydrogen-bond networks which surround the cations.
Formula: [Fe(C12H8N2)3](C10H5O8)2·H2O and [Fe(C10H8N2)3](C10H4O8)·C10H6O8·2H2O
Structure factor file (CIF format) (205.4 kbytes)
Structure factor file (CIF format) (395.5 kbytes)
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