title: Diaqua-(1,10-phenanthrolin-2-ol)nickel(II) dinitrate.
abstract: In the mononuclear title complex, [Ni(C(12)H(8)N(2)O)(2)(H(2)O)(2)](NO(3))(2), the Ni(II) ion is coordinated in a distorted octa-hedral geometry. The dihedral angle between the two mean planes defined by the phenanthroline ligands is 88.26 (6)°. Intra- and intermolecular O-H⋯O hydrogen bonds between the cation and the anions lead to the formation of a layered arrangement parallel to (010).
authors.forename: Qing Yun
authors.initials: QY
authors.lastname: Liu
authors.forename: Qi Sheng
authors.initials: QS
authors.lastname: Liu
authors.forename: Qing Ru
authors.initials: QR
authors.lastname: Zhao