Synthesis, characterization, and superoxide dismutase activity of two new copper(II) complexes of benzoylpyridine 4-phenylsemicarbazone

Two mononuclear complexes containing copper(II) and 2-benzoylpyridine 4-phenylsemicarbazone (BPS) and pseudohalides, [Cu(BPS)(N-3)] (1) and [Cu(BPS)(NCS) (H2O)]NO3 (2) have been synthesized and characterized by UV-Vis, Fast atom bombardment, electron paramagnetic resonance, and infrared spectroscopy. Crystal structures of these two complexes have been resolved by using single crystal X-ray studies. Complex 1 crystallizes in the triclinic lattice with space group P1 and is a distorted square planar geometry. Complex 2 also crystallizes in the triclinic lattice with space group P1 but is a distorted square pyramidal geometry with N3O2 chromophore. Both the complexes have g(parallel to) > g(perpendicular to) > 2.0023 and a G value less than 4, consistent with a d(x2-y2) ground state. Superoxide dismutase activities have also been examined.