Redetermination of aqua­(dihydrogen ethyl­enediamine­tetra­acetato-κ(5) O,O′,N,N′,O′′)nickel(II)

The crystal structure of the title compound, [Ni(C(10)H(14)N(2)O(8))(H(2)O)] or [Ni(H(2)edta)(H(2)O)] (H(4)edta is ethyl­ene­diamine­tetra­acetic acid), originally determined by Smith & Hoard [J. Am. Chem. Soc. (1959), 81, 556–561] has been redetermined to a significantly higher precision. The Ni(II) atom is coordinated in a distorted octa­hedral geometry by two N atoms and three O atoms from three carboxyl­ate groups of the H(2)edta(2−) ligand and by an O atom of a water mol­ecule. The complex mol­ecules are linked by inter­molecular O—H⋯O hydrogen bonds into layers perpendicular to [100].