Synthesis and characterization of Fe(II),Co(II),Ni(II),Cu(II) and Zn(II) complexes with Hexaaza macromolecule Ligands Derived from Semicarbazide

<strong>ABSTRACT</strong><br /> A new ligands( 3,4,6,14,15,17,23,24-Octaazatricyclo [17.3.1.18,12] tetracosa-1(23),8(24),9,11, 19 ,21- hexaene - 2,5,7,13,16,18 – hexaone), (L₁) and 2-(5-hydroxypentanoyl) hydrazinecarboxamide,(L₂)was prepared from the reaction of pyridine-2,6-dicarboxylic acid and glutaric acid with semicarbazide by microwave irradiation in solid state ,then was  reacted  with some transition metal(II) ions to form complexes of the type <br />  [M(L₁)Cl₂] , [M(L₁)]Cl₂ and [M(L₂)₂Cl]Cl , [M(L₂)₂Cl₂]where M= Fe(II) ,Co(II),Ni(II),Cu(II) and Zn(II). Adducts of  the type  [M(L₁)(PPh₃)Cl]Cl, [M(L₂)₂(PPh₃)]Cl₂ and [M(L₂)₂(PPh₃)Cl]Cl were prepared by the reaction of  the above complexes with triphenylphosphine in a  2:1 and 1:1 molar ratio . The prepared complexes and adducts were characterized by (C,H,N) analysis , metal content analysis , molar conductance, magnetic moment  measurements ,electronic and  IR spectroscopy, the ligand was characterized by ¹H,¹³C -NMR . The electronic spectra and magnetic measurements indicated that the complexes have octahedral environment around the metal ions.<br />