Synthesis and Spectral Identification of Various New Ligands and Complexes with (Pb2+)

Abstract

This paper involved  ,synthesis of new four ligands & their complexes with lead ion (Pb²⁺) have been synthesized via coupling reaction of azo compound & condensation reaction of imine compounds , the resulting compound containing azo group (ligand₁) linked with imine compound will react with (maleic anhydride , sodium azide , chloro acetyl chloride) to give other three ligands containing azo –heterocycles from ( azo–oxazepine , azo –tetrazole , azo –azetidine), All four ligands & their complexes were confirmed by  spectral  studies such as{FT.IR–spectra , ¹H.NMR-spectra , UV.Vis –spectra , Atomic Absorption  } , and  physical  studies  such as { molar conductance  ., solubility  in  different solvents   ., measurement of melting point } , with analytical  studies  such as  stoichiometric of complexes ., determination of  optimal  conditions of  complexes . It has been found that the four ligands behave as tridentate donor ligands forming chelates with (1:2) (Pb: ligand) stoichiometry .

Keywords : optimal , conductance , coordination , donor .