Crystal structure of trans-di­aqua­bis­­(4-cyano­benzoato-κO)bis­­(N,N-di­ethyl­nicotinamide-κN)zinc(II)

In the title complex, [Zn(C8H4NO2)2(C10H14N2O)2(H2O)2], the ZnII cation, located on an inversion centre, is coordinated by two water mol­ecules, two 4-cyano­benzoate (CB) anions and two di­ethyl­nicotinamide (DENA) ligands in a distorted N2O4 octa­hedral geometry. In the mol­ecule, the dihedral angle between the planar carboxyl­ate group and the adjacent benzene ring is 9.50 (14)°, while the benzene and pyridine rings are oriented at a dihedral angle of 56.99 (5)°. The water mol­ecules exhibit both an intra­molecular hydrogen bond [to the non-coordinating carboxyl­ate O atom, enclosing an S(6) hydrogen-bonding motif, where O⋯O = 2.6419 (19) Å] and an inter­molecular hydrogen bond [to the amide carbonyl O atom, enclosing an R22(16) ring motif, where O⋯O = 2.827 (2) Å]; the latter lead to the formation of supra­molecular chains propagating along the [110] direction