SYNTHESIS, STRUCTURE AND CHARACTERIZATION OF BINUCLEAR COPPER(II) COMPLEXES

At room temperature. dibenzoyl peroxide undergoes oxidative addition r eaction with metallic copper powder and pyridine N-oxide (triphenylpho sphine oxide or 2,9-dimethyl-4,7-diphenyl-10-phenanthrolin) which affo rds the last products as binuclear copper(II) complexes, [Cu(C5H5NO)-( C6H5COO)(2)](2)(1), [Cu(OPPh3)(C6H5COO)(2)](2)(2) and [Cu(C6H5COO)(C26 H20N2)](3, C26H20N2 is 2,9-dimethyl, 7-diphenyl-1, 10-phenanthrolin). The structure of the complexes were characterized by elemental analyse s, IR spectra, TG-DTA and magnetic property. Crystals(1) are triclinic , space group P1, a=0.92617(36), b=1.06973(17), c=1.08813(29) nm, alph a=59.60(2)degrees, beta=74.83(3)degrees, gamma=72.80(2)degrees, V=0.88 0 nm(3), D-c=1.520 g/cm(3), Z=1, R=0.044, R-w=0.048, Mr=805.78, 3477 r eflections with I > 3 sigma(1). Each copper(II) ion is coordinated by two bridging bidentate beuzoate ligands and one pyridine N-oxide or tr iphenylphosphine oxide to form dimeric binuclear molecules. The struct ure of the compound(1) shows a clear centre of symmetry.