Syntheses, Characterization and Radical Scavenging Activity of Two Copper(II) Complexes Containing Pyrazoles

By using a tripodal ligand tris (3,5-bimethyl-pyrazolylmethyl)amine (TMPzA) and a bridged ligand thiophenedicarboxylic acid (H2TPDC), two binuclear copper (II) complexes have been synthesized and characterized. It has been found that TMPzA lost an arm and coordinated to copper with di (3,5-bimethylpyrazolylmethyl)amine(DMPzA) in complex [Cu-2(DMPzA)(2)(TPDC)(2)]ClO4 (1). The structure presented a microcycle with the Cu (1) center dot center dot center dot Cu (1A) distance of 0.786 84 nm. The complex [Cu-2(TMPzA)(2)(TPDC)(H2O)(2)] (C104)2 (2) is a binuclear structure and with the TMPzA completely. The investigation in Feton system shows that complex 1 has better hydroxyl radicals scavenging property than that of complex 2. CCDC: 1411232, 1; 1411233, 2.