SYNTHESIS AND CHARACTERIZATION OF SOME MIXED-LIGAND COMPLEXES OF COPPER(II) AND COBALT(II) WITH SCHIFF-BASES AND HETEROCYCLIC ORGANIC-COMPOUNDS

Novel hexa-coordinated mixed-ligand complexes of copper(II) and cobalt(II) of the general formula [M(SB)(L-L)(H2O)], where L=L = 2'- PYBZ, HOEPS or 2'-APBX and SB = hbzaa2- for M = Cu(II), L-L = ECAP, CHPHM, 2'-PYBZ or HOEPS and SB = hbzaa2- for M = Co(II), and L-L = CHPHM or 2'-PYBZ and SB = hbzat2- for M = Co(II), have been synthesized by refluxing the respective metal salt/schiff base/heterocyclic organic donor in ethanol. The resulting complexes have been characterized on the basis of analytical data, conductance and magnetic measurements and infrared spectral studies. Suitable octahedral structures have been proposed for these complexes.