Original Articles
Nandababu Singh Laishram
Abstract
Cadmium (II) acetate complexes of some heterocyclic ligands like 2,2’ – bipyridine (bipy) and 1,10 – phenanthroline (phen)were synthesized. These complexes were characterized with the help of elemental analyses, i.r. spectral studies, molar conductance measurement and thermal analyses studies. They were found to have the formulae: 1 ( ) 2 2 2 Cd L OAc  .2H O and 2 ( ) 2 2 2 . C Cd L OA  H O where L1 = 2, 2'- bipyridine(bipy), L2 =1,10- phenanthrolile and OAc = acetate ion. From the thermal analyses, thermodynamic parameters such as Ea* (activation energy), DH (enthalpy change) and DS (entropy change) for the dehydration and decomposition reactions of the complexes, were evaluated using some standard methods. The order of stability of the anhydrous complexes, was found to be of the following increasing order: