Synthesis and stereochemical characterization of polychelates derived frombeta,beta-(2-hydroxy-5-chlorobenzoyl)-p-divinylbenzene

Polychelates of Mn(II), Fe(II), Co(II), Ni(II), Cu(II) and Zn(II) were synt hesized from beta,beta'-(2-hydroxy-5-chlorobenzoyl)-p-di-vinylbenzene (H2L) and metal salts. All of the chelates are coloured and insoluble in common organic solvents. Their probable structures were determined by visible refl ectance spectroscopy and magnetic measurements in conjunction with thermogr avimetric and IR spectral studies. Elemental analyses indicate a ligand : m etal ratio of 1: 1 for all of the polychelates with the association of wate r molecules except for the Mn(II) polychelate which does not have any water molecules. The half-decomposition temperature of the polychelates decrease s in the order: Ni(II) > Cu(II) > Mn(II) > Fe(II) > Co(II) > Zn(II). The el ectrical conductivities of these chelate polymers have been studied over a wide range of temperatures.