| Abstract: | Two Schiff bases, 1-acetylferrocene thiosemicarbazone (HL1) and 1,1′-diacetyl-ferrocene dithiosemicarbazone (H2L2) and their copper(II) complexes were prepared and characterized by elemental analysis, magnetic susceptibility, conductivity, and spectral (IR, UV–Vis, ESR) measurements The IR spectra showed that HL1 acts as neutral or monobasic bidentate ligand, coordinating to copper(II) through either thiono- or thiolo-sulphur and azomethine-N atoms, whereas H2L2 is a neutral or dibasic mononucleating or binucleating quadridentate ligand coordinating through the same atoms. Other spectral measurements indicate that complexes [(L1)2Cu], [(L2)Cu] and [(HL1)2Cu]X2, X?=?Cl, Br or ClO4 have square-planar geometry around copper(II) while [(HL1)CuX2] and [(H2L2)Cu2X4], X?=?Cl or Br, have distorted tetrahedral geometry. The biological activity studies of the complexes and the free ligands towards two gram positive and two gram negative bacteria and one fungal species have been studied and the potential is related to the nature and structure of the tested compounds. |
