Acta Cryst. (2007). E63, m2350  [ doi:10.1107/S1600536807036598 ]

Poly[sodium [₄-2-hydroxyphosphonoacetato(3-)]iron(II)]

J. Li, Y.-Y. Zhu, C.-Y. Huang, Z.-G. Sun and D.-P. Dong

Abstract: The title compound, NaFe[(O₃PCH(OH)CO₂)] or {Na[Fe(C₂H₂O₆P)]}_n, was synthesized under mild hydrothermal conditions. The Fe^II ion is octahedrally coordinated; all O atoms from the 2-hydroxyphosphonoacetate(3-) are involved in metal coordination. The overall structure can be described as a three-dimensional open framework with channels running along the a axis and with the charge?compensating Na⁺ cations located inside these channels. This architecture is further stabilized by a number of O-HO hydrogen bonds involving the protonated hydroxyl O atoms and carboxylate O atoms.

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