Abstract
Three copper(II) tridentate (NNO) Schiff base azido complexes, [Cu(L1)(N3)] (1), [Cu2(L2)2(μ2-1,1-N3)2] [Cu(L2)(N3)] (2) and [Cu(L3)(N3)] (3) have been synthesized and characterized [where HL1=1-(N-5-methoxy-ortho-hydroxyacetophenimino)-2,2-dimethyl-aminoethane], HL2=1-(N-ortho-hydroxyacetophenimine)-2,2-diethyl-aminoethane and HL3=1-(N-salicylideneimino)-2-(N,N-diethyl)-aminoethane]. The structure of complex (1) has been determined by single crystal X-ray diffraction analysis. In 1, out of four coordination sites of copper(II) ion, three are occupied by the NNO donor atoms of a tridentate Schiff base ligand, HL1 and the remaining site is occupied by terminal nitrogen of azido moiety. All the complexes exhibit high catalytic activity in epoxidation reactions of a variety of olefins with tert-butyl-hydroperoxide in acetonitrile. The catalytic efficacy of the copper(II) complexes has been studied in different solvent media. The antimicrobial activity of the complexes and their Schiff base ligand has also been studied.
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