Diaqua­Bis(N,N-Diethyl­Nicotinamide-Κn 1)Bis­(4-Formyl­Benzoato-Κo)Nickel(Ii)

Abstract

In the title centrosymmetric mononuclear NiII compound, [Ni(C8H5O3)2(C10H14N2O)2(H2O)2], the central NiII atom is coordinated by two O atoms from two 4-formyl­benzoate (FOB) ligands, two O atoms from two water mol­ecules and two N atoms from two diethyl­nicotinamide (DENA) ligands. The coordination geometry is slightly distorted octa­hedral, with four O atoms in the equatorial plane and two N atoms in axial positions. Intra­molecular O—H⋯O hydrogen bonds are observed. In the crystal structure, mol­ecules are linked into chains along the a axis by inter­molecular O—H⋯O hydrogen bonds. The structure is further stabilized by π–π inter­actions between the pyridine rings of DENA units, with a centroid–centroid distance of 3.668 (2) Å.