Thermal Studies on Some Metal Polychelates

Abstract

Chelates of Mn(II), Fe(II), Co(II), Ni(II) and Cu(II) have been prepared with the Schiff base ligand derived from 4,4´-dihydroxy-3,3´ -diacetylbiphenyl and benzildihydrazone having equimolar stoichiometry of the metal cations and ligand. All the chelates are coloured amorphous solids and highly insoluble in water and common
organic solvents. Thermogravimetric analyses have been cartied
out. Kinetic and thermodynamic parameters have also been
evaluated by using thermal decomposition pattern. D.C. electrical
conductivity study has also been carried out. The ligand field and
nephelauxetic parameters have also been determined from the spectra
using ligand field theory of allowed transitions.