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In the title compound, [Ni(C 4 H 5 NO 4 )(C 10 H 9 N 3 )(H 2 O)] n , the Ni II  cations are octahedrally coordinated by an N atom donor and two O donor atoms belonging to a tridentate iminodiacetate (ida) ligand in a  fac  fashion, an O atom donor from an aqua ligand, and  cis- disposed pyridyl N donor atoms from two 4,4′-dipyridylamine (dpa) ligands. The dpa ligands are disordered over two sets of sites in a 0.594 (7):0.406 (7) ratio. Through the bridging dpa ligands, [Ni(ida)(dpa)(H 2 O)] n zigzag coordination polymer chains are formed that are oriented along the  b -axis direction. These chain motifs are anchored into the three-dimensional supramolecular crystal structure of the title compound by means of O—H...O and N—H...O hydrogen-bonding pathways.

catena-Poly[[aqua(iminodiacetato-κ3 O,N,O′)nickel(II)]-μ-4,4′-dipyridylamine-κ2 N:N′]

catena-Poly[[aqua(iminodiacetato-κ³ O,N,O′)nickel(II)]-μ-4,4′-dipyridylamine-κ² N:N′]