COPPER(II) COMPLEXES OF HYDRAZONE DERIVATIVES

Three benzil based, macrocyclic oxygen-, nitrogen-, and sulfur-contain ing ligands, azacyclotetradeca-7,14-dithione-2,3,9,11-tetraene) ethano l (L(1)), traphenyl-1,2,5,6,8,9,12,13-octaazacyclotetradeca- 7,14-dith ione-2,4-diene (L(2)), ctaazacyclotetradeca-7,14-dione-2,4,9,11-tetrae ne) ethanol (L(3)); a cyclic ligand, 6-diphenyl-4-oxo-3,4,5,6-tetrahyd ro-2,3,5-triazine (L(5)) and two open chain ligands, benzilsemicarbazo ne (L(6)) and benzilbisthiosemicarbazone (L(4)) are reported. These li gands react with copper(II) chloride, nitrate and acetate. The complex es obtained have been characterized on the basis of NMR, IR, electroni c and mass spectral studies, conductance and analytical data. The stoi chiometry and the spectroscopic data of the complexes indicate that th e copper ions are coordinated by neutral ligands or by ligand anions f ormed by loss ofprotons from the ligand. The molecular and crystal str ucture of 6-diphenyl-4-oxo-3,4,5,6-tetrahydro-2,3,5-triazine (L(5)) wa s determined by X-ray diffraction; the space group is triclinic, P (1) over bar with a = 7.865(1) b = 14.101(6), c = 15.733(9) Angstrom, alp ha = 69.10(3)degrees, beta = 75.62(2)degrees, gamma = 86.69(2)degrees, V = 1578(1) Angstrom(3), Z= 4.