LAUSR

Abstract Complexation of [(p-cymene)RuCl2]2 and [Cp∗MCl2]2 (M = Rh/Ir) with chelating ligand 4-methylbenzenesulfonohydrazone ligands (L1 and L3) resulted in the formation of mononuclear cationic complexes having PF6 as the counter ion whereas, complexation with the triazolo pyridine based ligand (L2) resulted in neutral complexes with mono-dentate binding fashion to the metal center. All these complexes were fully characterized by analytical, spectroscopic and X-ray diffraction studies. The complexes showed typical piano stool geometry around the metal center with the ligands acting as NN′ donor chelating ligand (for L1 and L3) and mono-dentate ligand (for L2). Biological studies such as antibacterial and DNA binding studies were screened for the ligands as well as for the complexes. The complexes as well as ligands have not indicated any antibacterial activity but the triazolo ligand (L2) as well as complex 4 and complex 6 exhibited DNA binding activity.