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

The mononuclear title cadmium complex, [Cd(C10H14N2O)2(C8H4NO2)2(H2O)2], is centrosymmetric and contains two water mol­ecules, two 4-cyanobenzoate (CB) ligands and two di­ethyl­nicotinamide (DENA) ligands. All the ligands are coordinated to the CdII atom in a monodentate mode. The four nearest O atoms around the CdII atom form a slightly distorted square-planar arrangement, with the distorted octa­hedral coordination sphere being completed by the two pyridine N atoms of the DENA ligands at distances of 2.3336 (13) Å. The dihedral angle between the carboxyl­ate group and the adjacent benzene ring is 8.75 (16)°, while the benzene and pyridine rings are oriented at a dihedral angle of 57.83 (5)°. The water mol­ecules exhibit both intra­molecular [to the non-coordinating carboxyl­ate O atom, enclosing an S(6) hydrogen-bonding motif, where O⋯O = 2.670 (2) Å] and inter­molecular [to the amide carbonyl O atom, enclosing an R22(16) ring motif, where O⋯O = 2.781 (2) Å] O—H⋯O hydrogen bonds. The latter lead to the formation of supra­molecular chains propagating along [110].