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Two complexes have been synthesized through the reaction of copper(II) acetate dihydrate with 4,4´-bipyridine. Both were characterized by elemental analysis, magnetic moment, FT-IR spectroscopy, and thermogravimetric analysis. Semiempirical structural DFT studies of [Cu 2 (CH 3 COO) 4 (4,4.bipy) 2 ] n and 4,4´ bipyridine were carried out.4,4´-Bipyridine acts as bidentate ligand, breaking the Cu 2 (CH 3 COO) 4 unit and acting as bridge between the metal centers, yielding a polymeric structure bearing monodentate acetate groups. The compounds [Cu 2 (CH 3 COO) 4 (4,4-bipy) 2 ] n and [Cu 2 (CH 3 COO) 4 (4,4-bipy) 2 (H 2 O) 2 ] n have magnetic moments of 1.83 and 1.77 B.M, respectively. These values are higher than those of copper (II) acetate monohydrate (1.4 B.M). Keywords: metallic acetates, 4,4´-bipyridine, DFT calculations. INTRODUCTION Metal complexes with carboxylates and nitrogen ligand are the subject of particular interest due to their biochemical importance. Several studies of copper(II) acetate complexes with nitrogen ligands, such as pyridine, aminopyrimidine, bipyridyl, and nicotinamide, have been reported. Instead of forcing dissociation of the dinuclearCu

SYNTHESES AND CHARACTERIZATIONS OF COPPER COMPLEXES: INTERACTION OF COPPER ACETATE DIHYDRATE WITH 4,4´-BIPYRIDINE