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The asymmetric unit of 1 consists of two crystallographically independent Zn2+ centers, one completely deprotonated PIDC ligand, one coordinate water molecule, and one coordinated Cl atom in Fig. 1. Zn1 and Zn2 are four coordinated and five coordinated, respectively, Zn(1)NO2(Cl) and Zn(2)N2O2(H2O). In the Zn(1)NO2(Cl) moiety, four donors are one N atom of an pyriding ring, two O atoms of two carboxylate groups and one Cl atom. The geometry around this tetracoordinated Zn atom is distorted tetrahedral. While in Zn(2)N2O2(H2O) the Zn2 atom is coordinated to two PIDC ligands via two imidazole N atoms, two O atoms of the carboxylate groups and one O atom of water molecules. The N atoms of imidazole ring and the O atoms of the carboxylate groups behaves as a bidentate ligand forming a five-membered metallocycle. |
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