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In the title complex, [Zn(C 10 H 6 N 3 O 2 ) 2 (H 2 O) 4 ], the Zn II  ion lies on an inversion center and is coordinated in a slightly distorted octa­hedral geometry by two N atoms from two 2-(pyridin-4-yl)pyrimidine-5-carboxyl­ate ligands and four water mol­ecules. In the symmetry-unique part of the mol­ecule, the pyridine and pyrimidine rings form a dihedral angle of 7.0 (1)°. In the crystal, the coordinating water mol­ecules act as donor groups and carboxyl­ate O atoms act as acceptors in O—H⋯O hydrogen bonds, forming a three-dimensional network.

Tetraaquabis[2-(pyridin-4-yl-κN)pyrimidine-5-carboxylato]zinc