Synthesis, crystal and molecular structures, and properties of optically active copper(II) complexes with 3-N,N-dimethylaminocaran-4-one-oxime

Copper (II) complexes with 3-N,N-dimethylaminocaran-4-one-oxime (HL) were synthesized and characterized by X-ray diffraction analysis, photoelectronic, IR, and EPR spectroscopy, magnetic susceptibility, and thermal analysis methods, and their optical activities were studied. The [Cu-2(HL)(2)Cl-4] complex is a dimer with weak exchange interactions between unpaired electrons of the Cu(II) ions. The [Cu3L3(OH)Cl]Cl . 8H(2)O structure is composed of triangular trinuclear complex cations, outer-sphere Cl- anions, and water molecules. The exchange parameter J for the trinuclear exchange cluster is -190 cm(-1). The title complexes are optically active in the visible range of the spectrum.