Synthesis, reactivity and physico-chemical studies of some novel mixed ligand complexes of copper(II)

Abstract

Some copper(II) complexes having general formula, [(μ-Cl)₂Cu₂{η^-(sb)}₂] <b>1</b>, <b>2</b> and [Cu{η^-(sb)}₂] <b>3,4</b>, [where sbH =Schiff base, (salicylidene-2-aminophenol (saphH) for <b>1, 3</b> and salicylidene-3-nitro-1-aminobenzene (snabH) for <b>2, 4</b> have been synthesized by the interactions of anhydrous CuCl₂ with sodium salt of corresponding Schiff bases in different molar ratio(s) using THF and benzene as reaction medium. The complexes 1, 2 have been further treated with various sodium salts of phenol, hydroxobenzaldehyde and aluminiumtetraisopropoxide to produce some novel mixed ligand complexes of the types, [(μ-Oar)₂Cu₂{η²-(sb)}₂] <b>5,6</b>, [(η²-OBa) Cu{η²-(sb)}] <b>7, 8</b> and [(μ-OPrⁱ)₂Al(OPrⁱ)₂}Cu{η²-(sb)}] <b>9, 10</b>. All these derivatives have been characterised by elemental analysis, spectral (IR, UV-visible and ESR), magnetic susceptibility measurements and FAB-mass studies. On the basis of these results, a dimeric square planar geometry around copper(II) for the complexes 1, 2, 5 and 6 has been suggested.