EPR and electronic spectral studies on copper(II) complexes of some N-O donor ligands

Department of Chemistry, Zakir Husain College (University of Delhi), J. L Nehru Marg, New Delhi-110 002, India E-mail: schandra_00@yahoo.com Manuscript received 16 October 2001, revised 24 June 2003, accepted 12 September 2003 Complexes, [Cu(ligand-H)₂] of copper(II) with bidentate nitrogen-oxygen donor ligands, viz. 2-hydroxynaphthaldehydeoxime[hnoH₂], 2-hydroxyacetophenoneoxime [haOH₂], salicyladoxime [saIH₂] and 2-hydroxypropiophenoneoxime [hmpH₂] hate. been prepared. The complexes have square-planar geometry. The effect of axial ligand has also been studied by EPR spectra of the pyridine adduct of these complexes. Spectral features for diadducts are different compared to the monoadducts. All these pyridine adducts have tetragonal geometry.