synthesis and characterization of new acyclic octadentate ligand and its complexes

the reaction of an equivalent of 2- mercaptoethyl ammonium chloride with an equivalent of 2,6-diformyl -4- methyl phenol produced monoamine which was reacted with half equivalent of 1,2-diamine ethane to produce ethylene-bis-6-(2-mercapto-ethyl-imine)-methyl -4- methyl phenol [h4l]. the ligand was reacted with metal ions[cr(iii), mn(ii), fe(ii), co(ii), ni(ii), cu(ii), zn(ii), cd(ii), and hg(ii)] at reflux ethanol, under nitrogen at atmosphere. the ligand and derivative 2,6-diformyl-4-methylphenol and metal ion complexes were characterized by elemental microanalysis, ir, uv, (1h, 13c, 1h-1h, 1h-13c)nmr and mass spectroscopies and suggested structures and octahedral for the complexes [cr, mn, co, and ni] while complexes of [fe, zn, cd, and hg] suggested tetrahedral geometry and a distorted square planar geometry around copper complex.