NOVEL COMPLEXES OF ANTIPYRINE LIGANDS: DINUCLEAR COPPER(II), COBALT(II) AND NICKEL(II) COMPLEXES OF N,N′-TETRA(4-ANTIPYRYLMETHYL)-1,2-DIAMINOETHANE

The synthesis and properties of new cobalt, nickel and copper complexes of general formula M2(TAMEN)Cl4 [M = Co, Ni, Cu; TAMEN = N,N,′-tetra(4-antipyrylmethyl)-1,2-diaminoethane; antipyryl- = 2,3-dimethyl-1-phenyl-3-pyrazoline-5-one] and the 1H-NMR spectrum of the ligand TAMEN are reported. TAMEN bridges the two metal centres via two groups of donor atoms, each being formed of the carbonylic oxygens and a 1,2-diaminoethane nitrogen atom.