Synthesis and characterization of metal complexes of N-methyl- and N-ethylacetoacetanilide semicarbazones

Fourteen new metal complexes of N-methyl-(H2L) and N-ethylacetoacetanilide (H2L ') semicarbazones, having the general formulae [M(LH)(2)], [ML/L ' (H2O)], [ML/L ' (H2O)(3)], and [FeLCl(H2O)](2), where M = Mn(II), Co(II), NI(II), Cu(II), Zn(II), Cd(II) or Hg(II), LH = tridentate monoanion of H2L and L/L ' = tridentate dianion of H2L or H2L ', were synthesized. Characterization of these compounds was mainly done by chemical analyses, molar conductance, magnetic susceptibility and electronic, infrared and H-1 NMR spectral studies. Thermogravimetric studies of Mn(II), Co(II), Ni(LI), and Cu(II) complexes of N-methylacetoacetanilide semicarbazone were also carried out. [GRAPHICS]