title: Diaqua-bis(4-methyl-amino-benzoato-κO)bis-(nicotinamide-κN)nickel(II).
abstract: The title Ni(II) complex, [Ni(C(8)H(8)NO(2))(2)(C(6)H(6)N(2)O)(2)(H(2)O)(2)], is centrosymmetric with the Ni atom on an inversion center. The mol-ecule contains two 4-methyl-amino-benzoate (MAB) and two nicotinamide (NA) ligands and two coordinated water mol-ecules, all ligands being monodentate. The four O atoms in the equatorial plane around the Ni atom form a slightly distorted square-planar arrangement, while the slightly distorted octa-hedral coordination is completed by the two N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxyl-ate group and the adjacent benzene ring is 2.09 (14)°, while the pyridine and benzene rings are oriented at a dihedral angle of 66.15 (4)°. In the crystal structure, inter-molecular O-H⋯O and N-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network.
authors.forename: Tuncer
authors.initials: T
authors.lastname: Hökelek
authors.forename: Hakan
authors.initials: H
authors.lastname: Dal
authors.forename: Barış
authors.initials: B
authors.lastname: Tercan
authors.forename: Ozgür
authors.initials: O
authors.lastname: Aybirdi
authors.forename: Hacali
authors.initials: H
authors.lastname: Necefoğlu