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Acta Cryst. (2008). E64, m1554-m1555  [ doi:10.1107/S1600536808037203 ]

catena-Poly[[[aqua(1,10-phenanthroline-[kappa]2N,N')cadmium(II)]-[mu]-pyridine-2,3-dicarboxylato-[kappa]4N,O2:O3,O3'] dihydrate]

M. Li, W. Ha, L. Chang and L. Yuan

Abstract: The title complex, {[Cd(C7H3NO4)(C12H8N2)(H2O)]·2H2O}n, is a one-dimensional coordination polymer, wherein the Cd atom is seven-coordinated by two 1,10-phenanthroline N atoms, one N and three O atoms from two different pyridine-2,3-dicarboxylate ligands, and one water molecule. It is further extended to a two-dimensional layer structure by hydrogen bonds and [pi]-[pi] stacking interactions [centroid-centroid distances of 3.560 (2) and 3.666 (2) Å]. There is a C4 water chain in the structure whose repeat unit contains four water molecules with O...O distances in the range 2.748 (3)-2.795 (4) Å. One of the two H atoms of each water of hydration is statistically distributed over two positions with equal occupancy.

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