The stability of metal complexes with polydentate ligands depends on a range of factors such as the number and type of donor atoms present and their relative positions within the ligand, the nature of the ligand backbone, and the number and size of the chelate rings formed on complexation. If the ligand is a macrocycle, then the ring size is a further factor that will influence the complex stability. Consequently, macrocyclic ligands provide an excellent basis for the study of molecular recognition phenomena since their cavity size, shape and components can be varied readily [1,2]. In previous works, we have reported some macrocyclic Schiff base complexes containing N3O2 donor groups[3], And in another work we have reported some macrocyclic Schiff base complexes containing pyridine moieties [4, 5]. In this work Two aldehydes (Scheme 1 and 2) have prepaired by use of Mannich reaction method and their related complexes by perchlorate salts of Ni2+ , Cu2+ and Cd2+ were obtained by template method In the presence of 1,2-diamino ethane and 1,3 diamino propane. The aldehydes were investigated by elemental analysis ,IR spectroscopy ,1H and 13C NMR and related complexe were characterizated by elemental analysis , IR spectroscopy and X ray spectroscopy.
