ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Homo- and heteronuclear complexes of a new, vicinal dioxime ligand

M. Serin, G. Karayel, and R. Gup

Department of Chemistry, Mugla University, 48000 Kotekli-Mugla, Turkey

E-mail: rgup@mu.edu.tr

Received: 21 January 2007  Revised: 13 March 2007  Accepted: 22 March 2007

Abstract: A new symmetrical vicinal dioxime, N,N′-bis-{4-[[(2-hydroxyphenyl)methylene]hydrazinecarbonyl]phenyl}diaminoglyoxime (LH₄), was prepared by reacting anti-dichloroglyoxime with salicylaldehyde 4-aminobenzoylhydrazone. The reaction of ligand with Ni²⁺ salts gave mono-and homopentanuclear complexes, [Ni(LH₃)₂] and [Ni₅(LH)₂X₂]. Furthermore, heteropentanuclear complexes of dioxime ligand, [Cu₄Ni(LH)₂X₄], were prepared by the reaction of [Ni(LH₃)₂)] with Cu²⁺ salt and a monodentate ligand (X = SCN⁻, CN⁻, or N ₃ ⁻ ). The structures of both the new symmetrical vicinal dioxime and its complexes were identified by elemental analyses, IR, ¹H NMR, UV-VIS spectra, and magnetic susceptibility. The elemental analyses and spectral data indicate that the hydrazone side of ligand acts as a O,N,O′ tridentate and the fourth position is occupied with monodentate anion such as SCN⁻, CN⁻, N ₃ ⁻ .

Keywords: vic-dioxime - hydrazone - homonuclear complexes - heteronuclear complexes - nickel - copper

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-007-0035-2

Chemical Papers 61 (4) 286–291 (2007)