Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 8 (August 2013)

metal-organic compounds

Acta Cryst. (2013). E69, m452-m453    [ doi:10.1107/S1600536813018722 ]

catena-Poly[[[tetra­aqua­magnesium]-trans-[mu]-[(piperazine-1,4-diium-1,4-di­yl)bis­(methyl­ene)]di­phospho­nato] hemihydrate]

L.-H. Schilling and N. Stock

Abstract: The structure of the title polymer, }[Mg(C6H14N2O6P2)(H2O)4]·0.5H2O}n, is based on centrosymmetric MgO6 octahedra, which are linked by [(piperazine-1,4-diium-1,4-di­yl)bis­(methyl­ene)]di­phospho­nate ligands, forming chains parallel to [1-1-1]. These chains are connected via hydrogen bonds primarily formed between the phospho­nate groups and water mol­ecules. The latter constitute four of the corners of the MgO6 polyhedra and bind to the O atoms of the phospho­nate groups of neighbouring chains. The lattice water molecule is disordered around an inversion centre, exhibiting an occupancy of 0.25.

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