Acta Cryst. (2009). E65, m87-m88  [ doi:10.1107/S1600536808042190 ]

Diammonium aqua(ethylenediaminetetraacetato)iron(II) trihydrate

H.-M. Huang, H.-B. Yang, X.-Y. Li and F.-F. Ren

Abstract: In the title compound, (NH₄)₂[Fe(C₁₀H₁₂N₂O₈)(H₂O)]·3H₂O, the Fe^II center is in a distorted pentagonal-bipyramidal geometry. Two carboxylate O and two N atoms from the ethylenediaminetetraacetate (EDTA) ion and one O atom from coordinated water comprise the equatorial plane. Two other carboxylate O atoms from the EDTA ion occupy the apical sites. Both ammonium cations and all water molecules function as hydrogen-bond donors, and ten N-HO and nine O-HO hydrogen bonds form a three-dimensional network between the complex anions, cations and the water molecules.

Online 17 December 2008

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