Preparation and Characterization of some Transition Metal Complexes with Two Mixed Ligands Macrocyclic and Ligands PPh3

A new ligand (3,4,6,14,15,17,23,24-octaazatricyclo [17.3.1.1 8 ,12] tetracosa-1(23),8(24),9,11, 19, 21hexaene 2,5,7,13,16,18 – hexaone), (CHT) was been prepared from the reaction of pyridine-2,6-dicarboxylic acid with semicarbazide using microwave irradiation in solid state. The ligand is reacted with some transition metal(II) ions to form complexes of the type [Co(CHT)]Cl2, [Fe(CHT) Cl]Cl and [M(CHT)Cl2] where (M=Mn(II), Ni(II), Cu(II) and Zn(II)). Complexes of the type [Ni(CHT)(PPh3)]Cl2 and [M(CHT)(PPh3)Cl]Cl where (M=Mn(II), Fe(II), Co(II), Cu(II) and Zn(II)), were prepared by the reaction of the above complexes with triphenylphosphine(PPh3) in a 1:1 molar ratio. All the complexes were characterized by (C,H,N) analysis, metal content analysis, molar conductance, magnetic moment measurements, electronic and IR spectroscopy, as well as the ligand was characterized by 1 H , 13 C -NMR. The electronic spectra and magnetic measurements indicate that the complexes have octahedral environment around the metal ions, except cobalt complex have square planer geometry.