Preparation and characterisation of some new polymeric chelates of transition metal ions

Polymeric complexes of 4,4'-bis-mercaptoacetamide diphenyl (BMAD), 4,4'-bis-mercaptoacetamide-3,3'-dimethyl diphenyl (BMADD) and 4,4'-bis-mercaptopropionamide-3,3'-dimethyl diphenyl (BBMPDD) have been synthesised by the interaction of these ligands with transition metal ions, viz., Mn(II), Co(II), Ni(II), Cu(II) and Zn(II), under suitable experimental conditions. The extent of interaction of metal to ligand has been established as [ML](n) in case of Mn(II), Cu(II) and Zn(II) polymers whereas [ML(H2O)(2)](n) in case of Co(II) and NI(II) polymers. The composition was established on the basis of elemental analysis while electronic spectra, magnetic moment, infrared spectral studies and thermogravimetric analysis have been used for the structural aspects of the chelates. Thermal studies of these polymeric chelates indicate their stability up to 380-440 degrees C. All these polymeric chelates were found to be amorphous and insoluble in almost all organic solvents which indicates their high polymeric nature.