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In the title compound, [Cu(C 6 H 3 N 2 O 5 ) 2 (H 2 O) 2 ], the Cu II  ion, lying on an inversion center, is coordinated by two pyridine N atoms and two carboxyl­ate O atoms from symmetry-related two 4-hy­droxy-5-nitro­pyridine-2-carboxyl­ate ligands, and two water mol­ecules, forming a distorted octa­hedral geometry. In the crystal, O—H⋯O hydrogen bonds link the complex mol­ecules. One of the H atoms of the water mol­ecule is disordered over two sites of equal occupancy.

Diaquabis(4-hydroxy-5-nitropyridine-2-carboxylato-κ2N1,O2)copper(II)

Diaquabis(4-hydroxy-5-nitropyridine-2-carboxylato-κ²N¹,O²)copper(II)