A crystallographic, spectroscopic, thermal, and DFT investigation of mixed ligand Cu(II) complexes of 2-benzoylbenzoate

Two mixed ligand complexes of copper(II)-2-benzoylbenzoate (bba) with pyridazine and 4-picoline, namely bis(2-benzoylbenzoate) di(pyridazine) copper(II) 1 and bis(2-benzoylbenzoate)bis(4- picoline)copper(II) 2, have been synthesized and characterized by X-ray crystallography. Complexes 1 and 2 crystallize in the monoclinic P21/c space groups. The calculated frequency shifts have shown that the participation of carboxylate groups in coordination to themetal centers in monodentate fashion (δ(OCO)>200 cm-1). The structural features of the complexes have been further studied by DFT/X3LYP extended hybrid functional. The thermal behavior of the complexes was studied by means of simultaneous thermogravimetry, differental thermogravimetry, and differential thermal analysis methods in a static air atmosphere. Copyright © Taylor & Francis Group, LLC.