Twelve polymeric complexes were prepared from the polymerization of phenylazo-3-N-(4- hydroxyphenyl) maleimide and Phenylazo-3-N-(3-hydroxyphenyl) maleimide, with salts of Cr3+, Co2+, Ni2+, Mn2+, Cu2+ and Fe2+ these complexes were characterized by U.V., I.R. spectroscopy, elemental analysis, molar conductivity and magnetic moment, to ensure their geometry, according to these measurements all the complexes have tetrahedral geometry accept [CrL2Cl3.H2O ] and [NiL1Cl2.2H2O] which have octahedral one. The biological activity of these complexes showed a moderate inhibition towards some growth bacteria.

Two new tetradentate ligands (L1 and L2) N,N'-bis {(o-aminophenylthio)bromo propyl} 1-phenyl butane 1,3-dilidene (L1), N, N'-bis (3- bromo propyl (phenylthio) imino)1,1,1-trifluoro -3-(2-theonyl) acetone (L2) were prepared from the reaction of equimolar amount of (o-aminophenylthio) propylebromide and benzoylacetone or 2- theonyltrifluoro acetone in (2:1) molar ratio. Reaction of the above ligands with cobalt(II), nickel(II), copper (II) and zinc(II) chloride salts gave the complexes of the general formulas: [M(L)]Cl2 and [Zn(L)Cl2], M= Co(II), Ni(II), Cu(II) and Zn(II), L= L1-L2. The synthesized ligands and their complexes were characterized by their elemental analysis FTIR, UV-Vis, metal content, conductivity measurement and magnetic measurement. On the basis of these studies at four coordinate tetrahedral geometry around the metal ion has been proposed and the ligands behave us tetradentate from nitrogen atoms of the azomthine and two sulfur atoms while for zinc (II) complexes from the two sulfur atoms and two chloride ions.