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Acta Cryst. (2013). E69, m127
[ doi:10.1107/S1600536813002122 ]

Diaqua(5-carboxybenzene-1,3-dicarboxylato-[kappa]O1)[8-ethyl-5-oxo-2-(piperazin-4-ium-1-yl)-5,8-dihydropyrido[2,3-d]pyrimidine-6-carboxylato-[kappa]2O5,O6]zinc monohydrate

Z.-L. Ye, G.-H. Xin, F.-T. Zhang and D.-R. Xiao

Abstract: In the title compound, [Zn(C14H17N5O3)(C9H4O6)(H2O)2]·H2O, the complex molecule exists in a zwitterionic form. The ZnII ion exhibits a distorted tetragonal-pyramidal geometry, being coordinated by two O atoms from the zwitterionic 8-ethyl-5-oxo-2-(piperazin-4-ium-1-yl)-5,8-dihydropyrido[2,3-d]pyrimidine-6-carboxylate (L) ligand, one O atom from the 5-carboxybenzene-1,3-dicarboxylate dianion, [Hbtc]2-, and two O atoms from two aqua ligands. In the crystal, N-H...O and O-H...O hydrogen bonds link the components into a three-dimensional structure. The crystal packing exhibits [pi]-[pi] interactions between the aromatic rings, with centroid-centroid distances in the range 3.466 (3)-3.667 (3) Å.

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