خسرو محمدی

Some new Schiff bases derived from 2,3- diaminopyridine and their new Co(III) complexes were synthesized and characterized. The formation constants of the Co(III) complexes vary according to the following trend: 5-MeO[5-H[5-Br and 5-MeO[3-MeO[ 4-MeO. For a given donor, the order of formation constants according to the axial ligand is PBu3[PPh2Me. The binding trend of the donors toward a given cobalt(III) Schiff base complex is as follows: benzylamine[nbutylamine[ sec-butylamine[tert-butylamine; Im[2- MeIm[2-EtIm[BzIm; and PBu3[PPh2Me.