Two New 2-Benzoylbenzoate Metal Complexes with Bapen: Synthesis, Spectroscopic and Crystal Structures

Abstract

Coordination compounds of compositions [Ni(bba)(2)(bapen)] (1) and [Cu(bba)(2)(bapen)]0.5H(2)O (2), where bba = 2-benzoylbenzoate, bapen = N,N'-bis(3-aminopropyl)ethylenediamine, have been prepared. The crystal and molecular structure of (1) and (2) were determined by X-ray analysis. Nickel and copper atoms are six-coordinated by four N atoms of amine and O donor atoms of 2-benzoylbenzoate anions, whereas 0.5 water molecule is situated outside the coordination sphere in (2). The calculated a dagger(OCO) values are consistent with presence of monodentate carboxylate. Thermal analysis show that the mass losses of 1 in the temperature ranges 240-343 A degrees C correspond to the decomposition of bba ligands, while the mass losses of 2 in the temperature ranges 105-125 A degrees C correspond to the decomposition of crystal lattice water molecule.