IR and ESR studies on novel Cu(II) theophyllinato complexes containing mono- or bidentate ligands

Three mixed-ligand copper(II) complexes containing theophylline and mono- o r bidentate N-donor ligands (2,2'-bipyridine, 4-fluoraniline and 1,10-phena nthroline) were synthesized and characterized by elemental analysis, IR and ESR spectra. According to IR and ESR data the Cu(II) complexes exhibit a d istorted tetrahedral coordination of copper by two nitrogen atoms of the mo nodentate or bidentate ligands and the two monodentate theophyllinate anion bonded through N(7) atom. (C) 1999 Elsevier Science B.V. All rights reserv ed.