catena‐Poly[[[(2,2′‐bipyridylamine‐κ2N,N′)copper(II)]‐μ2‐l‐aspartate‐κ3O,N:O′] monohydrate]

In the title complex, {[Cu(C4H5O4N)(C10H9N3)]·H2O}n, the Cu atom has a distorted CuO2N3 square‐pyramidal geometry formed by an N,O‐bidentate aspartate (asp) anion and an N,N‐bidentate 2,2′‐bipyridylamine (bpa) molecule in the basal positions, and an O‐monodentate asp ligand in the apical site. The complex forms a polymeric chain in which each metal centre is bridged to the next one by the asp anion. The crystal structure is stabilized by O—H...O and N—H...O hydrogen bonds and π–π stacking interactions involving the bpa ligands [centroid–centroid separation = 3.699 (4) Å].