Synthesis, structure and properties of ruthenium(II) complexes with quinolinedione derivatives as chelate ligands:: Crystal structure of [Ru(CO)2Cl2(6-methoxybenzo[g]quinoline-5,10-dione)]

The reaction of the dimer complex [{Ru(CO)(3)Cl-2}(2)] with the ligands 4,6-dichloroquinoline-5,8-dione and 6-methoxybenzo[g]quinoline-5, 10-dione in ethanol solution led to the neutral mononuclear complexes of general formula [Ru(CO)(2)Cl-2(kappa(2)-quinolinedione-N,O)]. The complexes were characterized by elemental analysis, IR and RMN spectroscopy, and the molecular structure of [Ru(CO)(2)Cl-2(6-methoxybenzo[g]quinoline-5,10-dione)] was determined by single-crystal X-ray diffraction. The redox chemistry of ligands and complexes was investigated by cyclic voltammetry, and their potential antitumor activity was also evaluated. (C) 2007 Elsevier Ltd. All rights reserved.