Acta Cryst. (2007). E63, m2921  [ doi:10.1107/S1600536807055468 ]

Piperazinediium bis[bis(pyridine-2,6-dicarboxylato)ferrate(III)] monohydrate

H. Aghabozorg, A. Nemati, Z. Derikvand and M. Ghadermazi

Abstract: The asymmetric unit of the title compound, (C₄H₁₂N₂)[Fe(C₇H₃NO₄)₂]₂·H₂O or (pipzH₂)²⁺·2[Fe(pydc)₂]^-·H₂O (pipz is piperazine and pydcH₂ is pyridine-2,6-dicarboxylic acid), contains one dication, two anions and one uncoordinated water molecule. In the anions, each Fe^III ion is hexacoordinated by four O [Fe-O = 2.005 (2)-2.044 (2) Å] and two N [Fe-N = 2.050 (2)-2.075 (2) Å] atoms in a distorted octahedral geometry. An extensive three-dimensional network formed by classical O-HO and N-HO and weak C-HO intermolecular hydrogen bonds stabilizes the crystal packing, which also exhibits - [centroid-centroid distances 3.500 (2)-3.533 (2) Å] and C-H interactions.

Online 7 November 2007

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