Structural and thermal analysis of some imipramine complexes

imipramine interacts with transition metals to give different molar ratios (M:L), (1:1) with Mn(II), Zn(II), Cd(II) and Hg(II) and (1:2) with Cr(III), Fe(III), Co(II), Ni(II) and Cu(II) .All were characterized by elemental analysis, IR, electronic spectra and magnetic susceptibility. IR spectra indicated that imipramine behaves as a bidentate ligand through its heterocyclic nitrogen atom and the tertiary nitrogen atom of the side chain. The geometry around the metal atoms is octahedral in all complexes except for Zn has tetrahedral structure. It was indicated by TGA and DTA analysis that the thermal decomposition of most complexes ended with the formation of metal oxides and carbon residue as a final product. For this reaction, the kinetic parameters and the orders were estimated. The decomposition course and steps were also analyzed. Consequently, decomposition mechanisms were suggested.