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Synthesis, structure, and solvent-extraction properties of tridentate oxime ligands and their cobalt(II), nickel(II), copper(II), zinc(II) complexes

Bülent Dede, Fatma Karipcin, Filiz Arabalı, and Mustafa Cengiz

Department of Chemistry, Faculty of Sciences and Arts, Süleyman Demirel University, 32260 Isparta, Turkey



Received: 17 June 2009  Revised: 8 August 2009  Accepted: 12 August 2009

Abstract: Synthesis of four different types of ligands Ar[COC(NOH)R] n (Ar = biphenyl, n = 1, HL1; Ar = biphenyl, n = 2, H2L2; Ar = diphenylmethane, n = 1, HL3; Ar = diphenylmethane, n = 2, H2L4; R = furfurylamine in all ligands) and their dinuclear Co2+, Ni2+, Cu2+, and Zn2+ complexes is reported herein. These compounds were characterized by elemental analysis, ICP-OES, FT-IR spectra, and magnetic susceptibility measurements. The ligands were further characterized by 1H NMR. The results suggest that dinuclear complexes of HL1 and HL3 have a metal to ligand mole ratio of 2: 2 and dinuclear complexes H2L2 and H2L4 have a metal to ligand mole ratio of 2: 1. Square pyramidal or octahedral structures are proposed for complexes of oxime ligands. Furthermore, extraction abilities of the four ligands were also evaluated in chloroform using selected transition metal picrates such as Mn2+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+, Hg2+, Pb2+. The ligands show strong binding ability towards Hg2+ and Cu2+ ions.

Keywords: oxime - hydroxyiminoketones - dinuclear complexes - solvent extraction

Full paper is available at

DOI: 10.2478/s11696-009-0095-6


Chemical Papers 64 (1) 25–33 (2010)

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