Acta Cryst. (2009). E65, m459  [ doi:10.1107/S1600536809010599 ]

Tetraaquabis[(1-ammonio-1-phosphonoethyl)phosphonato]zinc(II) tetrahydrate

A. Dudko, V. Bon, A. Kozachkova and V. Pekhnyo

Abstract: The title compound, [Zn(C₂H₈NO₆P₂)₂(H₂O)₄]·4H₂O, was synthesized by the reaction of ZnCl₂ with 1-aminoethane-1,1-diyldiphosphonic acid in aqueous solution. The asymmetric unit contains one-half of the complex and two water molecules of solvation. The Zn atom occupies a special position on an inversion centre. This results in a slightly distorted octahedral coordination environment, which consists of the O atoms from two phosphonic acids and four water molecules. The crystal structure displays N-HO and O-HO hydrogen bonding, which creates a three-dimensional network.

Online 28 March 2009

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