Abstract

The biological and industrial importance of many transition metals like iron, cobalt, copper etc., has been well
studied. However, the attempts to employ inorganic salts of these metals in medical practice were not successful
as most of them are highly toxic. In such cases Polymer-Metal Complexes can be used as substitutes both for
addition and removal of metal ions into and out of a system. The use of water soluble polymer like poly (vinyl
pyrrolidone), as a ligand, broadens the applications of these complexes. Polymer-metal complexes of poly (vinyl
pyrrolidone) and cobalt were prepared by using aqueous solution of PVP (30K) and alcoholic solution of cobalt
chloride hexahydrate (CoCl2∙ 6H2O) at room temperature with different molar compositions. The polymer-metal
complexes were obtained in crystalline form by evaporation of the solvent. They were characterized by FTIR, 1H
-NMR with DMSO as solvent and 13C - NMR. Procedure was repeated with aqueous solution of the salt also.
The extent of complex formation was predicted by comparing the spectral data of the complexes with that of
pure poly (vinyl pyrrolidone). The conditions for better complexation were optimized.