Diaqua­Bis­(N,N′-Diethyl­Nicotinamide-Κn1)Bis­(4-Ethyl­Benzoato-Κo)Copper(Ii)

Abstract

The title CuII complex, [Cu(C9H9O2)2(C10H14N2O)2(H2O)2], contains two 4-ethyl­benzoate (PEB) ligands, two monodentate diethyl­nicotinamide (DENA) ligands and two water mol­ecules. The four O atoms in the equatorial plane around the CuII ion form a slightly distorted square-planar arrangement, while the 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 4.6 (3) and 3.7 (2)°, while the pyridine rings and the benzene rings are oriented at dihedral angles of 6.82 (11) and 3.63 (14)°. 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 = 3.469 (2) Å] are also observed.