RESUMEN
A series of transition elements complexes with [2,6-diacetimino-pheylenediamine – [2,2,diyl] pyridine] of the general formula [MLCl]Clx, (where M= Cr(III), Pb(II), Zn(II) and Cd(II), x= 2 for Cr(III)) respectively have been synthesized and fully characterized on the bases of C.H.N.M, elemental analysis, 13C NMR, UV- Visible and FTIR spectra , in addition the structure of complexes was characterized by magnetic moments and molar conductance in DMF solution ,and molar ratio of complexes were also determined. On the basis ofelectronic spectral studies .All complexes have an octahedral geometry around the metal center in (1:1) (L:M). A theoretical treatment of the formation of complexes in the gas phase was studied, this was done using the HYPERCHEM-6 program for the Molecular mechanics and Semiempirical calculations. The batch adsorption method has applied on N5 polydentate ligand to remove the selected toxic metal ions from waste water after immobilization the newly n5-ligand on silica gel by physic-chemical method.