Synthetic, structural, thermal and electrical properties of some transition metal polymeric chelates of bis(mercaptoacetamido)diaminobutane

Polymeric chelates of bis(mercaptoacetamido)-1,4-diaminobutane (BMADB) with manganese(II), cobalt(II), nickel(II), copper(IT), zinc(II) and cadmium(II ) ions have been synthesized and characterized by elemental analysis, magne tic moment, infrared, electronic spectra and thermal analysis. In the prese nt investigation the ligand BMADB exhibits bis-bidentate character and coor dinates symmetrically with metal through nitrogen of amido and sulfur of me rcapto groups. The thermogravimetric studies indicate a two stage decomposi tion and the presence of water molecules. Thermal data have been analyzed b y Freeman-Carroll and Sharp-Wentworth methods and various kinetic and therm odynamic parameters have also been evaluated. Comparable values of paramete rs indicate common decomposition reaction mode in all chelates. Their d.c. electrical conductivity in pellet form over a wide range of temperatures ha ve also been studied.