Diaquabis(N,N-diethylnicotinamideκN¹)bis(4-ethylbenzoato- κO)cobalt(II)

The title CoII complex, [Co(C₉H₉O₂) ₂(C₁₀H₁₄N₂O)₂(H ₂O)₂], contains two 4-ethylbenzoate (PEB), two monodentate diethylnicotinamide (DENA) ligands and two water molecules. The four O atoms in the equatorial plane around the Co^II ion form a slightly distorted square-planar arrangement, while the slightly distorted octahedral coordination is completed by the two N atoms of the DENA ligands in the axial positions. Intramolecular O-H⋯O hydrogen bonds link the water molecules to the carboxylate groups. The dihedral angles between the carboxylate groups and the adjacent benzene rings are 4.52 (18) and 4.56 (18)°, while the pyridine rings and the benzene rings are oriented at dihedral angles of 7.76 (10) and 5.67 (13)°. In the crystal, intermolecular O-H⋯O hydrogen bonds link the molecules into chains propagating along [010]. C-H⋯O interactions and a π-π contact between the pyridine rings [centroid-centroid distance = 3.476 (2) Å] are also observed.