NEW COORDINATION POLYMERS OF 1,4-BIS(2'-HYDROXYPHENYLAZOMETHINE) PHENYLENE

Coordination polymers of 1,4-bis(2'-hydroxyphenylazomethine) phenylene have been prepared with the metal ions Ti(III), Cr(III), Fe(III), Mn(II), Ni(II), and Cu(II). They were characterized by elemental analysis, IR, and electronic spectra. The metal contents in all polymers were found to be consistent with a 1:1 (metal:ligand) stoichiometry. The thermal behavior of these coordination polymers has been studied by thermogravimetric analysis in air up to 750-degrees-C, and the data showed that they are thermally stable up to 200-degrees-C. Physical properties such as the solubility and viscosity of the polymer complexes were also determined. Electrical conductivity measurements of the synthesized polychelated polymers showed that they are insulators except for the Ni(II) complex which shows a semiconducting character. Mossbauer data clearly establish the 3 + oxidation state for the iron complex polymer.