摘要:
New nickel(II) and copper(II) complexes of four Schiff base ligands formed from benzoylacetone and 2-hydroxynaphthaldehyde with S-alkyl esters of dithiocarbazic acid have been prepared and characterized by IR, NMR, ESR and electronic spectroscopic techniques. The Schiff bases yield neutral 1:1 complexes of general formula M(ONS) (ONS2- = dinegatively charged anions of the Schiff base ligands; M = Ni, Cu). Magnetic and spectral evidence support a dimeric structure for these complexes. The complexes, M(ONS)B (B = py, dipy, phen), were also prepared. The complexes, M(ONS)py, are square-planar but electronic and ESR spectroscopic data support a five-coordinate geometry for the Cu(ONS)B (B = dipy, phen) complexes. Based on spectroscopic and magnetic data, a thiolato, sulphur-bridged, octahedral structure is assigned to the Ni(ONS)B (B = dipy, phen) complexes.