Synthesis, spectroscopic investigation and biological activity of metal(II) complexes with N 2 O 4 ligands

摘要: A new series of Mn(II), Ni(II), Co(II) and Cu(II) complexes derived from diacetylmonoxime 2-, 4- 6-aminobenzoic acids have been prepared characterised by elemental thermal analyses (DTA, DTG TG) as well 1 H 13 C NMR, IR, UV-Vis., Mass ESR spectra, magnetic susceptibility conductance measurements. The IR spectral data show that the ligands behave mono- or di-basic, bis-, tri-, tetradentate-chelates towards metal ion. stability is achieved via intra- inter-molecular hydrogen bonding OH-group with oximato-oxygen atom oxygen a carboxylic group, giving polymeric networks in solid state. Molar conductances DMF solution indicate are non-electrolytes. spectra [Co (HL ) 2 ].2H O (4), [Mn(HL ].H (5), (H O) (10), [Cu HL 3 (OAc) 4 ] (12) [(Mn) (L 6 ].4H (15) at room temperature 77 K, isotropic, however, copper(II) [Cu(HL )(OAc)(H } (2) (7) non-axial axial (d x2-y2 respectively covalent bond character. exhibit greater inhibitory effects than tetracycline (bacteria) amphotricen (fungi).