Acta Cryst. (2012). E68, m1088
[ doi:10.1107/S1600536812031789 ]

Poly[[bis(-3-amino-5-carboxybenzoato-²N:O¹)diaquazinc] dihydrate]

K.-L. Zhang, T.-T. Qiu and S. W. Ng

Abstract: The Zn^II atom in the title polymeric compound, {[Zn(C₈H₆NO₄)₂(H₂O)₂]·2H₂O}_n, lies on a center of inversion and is coordinated by two amine N atoms and two carboxylate O atoms from two 3-amino-5-carboxybenzoate anions along with two water molecules in a distorted octahedral geometry. The bridging nature of the anion generates a layer motif parallel to (100). Hydrogen bonds of the N-HO and O-HO types exist in the structure. One H atom of the coordinated water molecule and one H atom of the solvent water molecule are each disordered over two positions in a 1:1 ratio.

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