Complex compounds of nickel(II) with bidentate heterocyclic ligands using both S and N as donor atoms

Faculty of Chemistry, University of Craiova, Calea Bucuresti 165, Craiova, Romania

E-mail : albatros@dahas.ro                        Fax : 040251597048

Department of Research and Development, Aircraft S.A., Aeroportului 1, Craiova, Romania

Manuscript received 22 September 2003, accepted 12 January 2005

New complex compounds of Ni^lI with bidentate heterocyclic ligands (N, S) of dibenzofuran series (L) are presented. Analytical data, UV, visible, IR, EPR and NMR spectra, conductivity and magnetic susceptibility measurements suggest that the compounds are of [NiLCl₂] type, with the square-planar geometry. A quantum-mechanical explanation for the electronic spectra of the free and coordinated ligands has been found using EHT-MO approach.