Received 9 January 2013
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-HO and O-HO hydrogen bonds link the components into a three-dimensional structure. The crystal packing exhibits - interactions between the aromatic rings, with centroid-centroid distances in the range 3.466 (3)-3.667 (3) Å.
Data collection: SMART (Bruker, 2001); cell refinement: SAINT (Bruker, 2001); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: CV5383 ).
This work was supported financially by the Science and Technology Foundation of Southwest University (grant No. SWUB2007035) and the Science and Technology Innovation Foundation for Students of Southwest University.
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