Studies on complexes of cobalt(II), nickel(II), copper(II), and cadmium(II) with acetophenone and 4-hydroxyacetophenone oxaloyldihydrazones

The complexes [M(L-1)(n)Cl-2] and [Cu(L-2)SO4(H2O)(2)] [M = Co(II), Ni(II), Cu(II) and Cd(II); L-1 = acetophenone oxa- loyldihydrazone (CONHN = C(CH3)C6H5)(2), n = 2 and L-2 = 4-hydroxyacetophenone, oxaloyldihydrazone (CONHN= C(CH3)C6H4OH-4)(2) have been prepared. Analytical, molar conductance, magnetic susceptibility, electronic, ESR and NMR spectral data have been used to investigate the structure and bonding of the complexes. X-ray powder diffraction data indicate the shape and size of the unit cell of the copper(II) complex. Some of the complexes were screened against E. coli and Aspergillus niger for biological activity.