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

Abstract

The title CuII complex, [Cu(C7H4BrO2)2(C10H14N2O)2(H2O)2], contains two 4-bromo­benzoate (PBB), two diethyl­nicotinamide (DENA) monodentate 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 slightly distorted octa­hedral coordination is completed by 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 3.1 (3) and 3.74 (17)°, while the pyridine rings and the benzene rings are oriented at dihedral angles of 6.81 (10) and 3.38 (12)°. In the crystal, inter­molecular O—H⋯O hydrogen bonds link the mol­ecules into double chains along the b axis. C—H⋯O inter­actions are also observed. π–π contacts between pyridine rings [centroid–centroid distance = 3.485 (2) Å] may further stabilize the crystal structure.