Synthesis and Structural Investigations of Some New Polychelates

Abstract

Polychelates of Cu(II), Ni(II), Co(II), Mn(II), Zn(II), oxovanadium (IV) and dioxouranium(VI) with poly[(2,4-dihydroxyphenylethanone)-3,5-diyl-l,3-dimeth-ylene thiourea] were synthesised. Elemental analyses of the coordination polymers indicate a 1:2 metal to ligand ratio. The diffuse reflectance spectra and magnetic moments of the coordination polymers show a distorted octahedral structure. Infrared spectral studies show that the metals are coordinated through the oxygens of the carbonyl and phenolic groups and the nitrogen of the thioamide group. The thermal stabilities of coordinated polymer were determined by thermogravimetry. Semi-conducting behaviour of the polymer and its coordination polymers were also studied by electrical conductivity measurments at different temperatures. The electrical conductivity of all the compounds was found to be in the range 10⁻¹³ ohm⁻¹ cm⁻¹ at room temperature.