Diaqua-bis-[4-(dimethyl-amino)-benzoato-κO]bis-(nicotinamide-κN)zinc(II) dihydrate.

In the centrosymmetric title structure, [Zn(C(9)H(10)NO(2))(2)(C(6)H(6)N(2)O)(2)(H(2)O)(2)]·2H(2)O, the Zn(II) cation, located on an inversion center, is coordinated by two 4-(methyl-amino)-benzoate anions, two nicotinamide ligands and two water mol-ecules in a slightly distorted octa-hedral geometry. The dihedral angle between the carboxyl-ate group and the attached benzene ring is 3.09†(9)°, while the pyridine and benzene rings are oriented at a dihedral angle of 77.10†(4)°. The uncoordinated water mol-ecule is linked to nicotinamide ligands by O-H⋯O hydrogen bonds. In the crystal, inter-molecular N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network. A weak N-H⋯π inter-action also occurs.