THERMAL DECOMPOSITIONS OF SOME DIVALENT TRANSITION-METAL COMPLEXES OFTRIETHANOLAMINE

The thermal behaviours of the Ti(II), Mn(II), Fe(II), Ni(II), (II), Zn (II) and Zn(II) complexes of triethanolamine were studied by means of thermogravimetry, differential thermogravimetry, differential thermal analysis infrared spectrophotometry and elemental analysis. The sequen ce of thermal stability of the metal complexes, determined by using th e initial decomposition temperature, was found to be Ti(II) congruent to Mn(II)>Fe(II)>Ni(II)>Zn(II)>Cu(II). Some of the kinetic parameters, such as the activation energy and order of reaction for the initial d ecomposition reaction, were calculated and the relationship between th e thermal stability and the chemical structure of the complexes is dis cussed.