Synthesis, Characterisation and Electrochemistry of Some Stable Ruthenium(II) Complexes of the Bidentate NS Chelating Ligand 1-Amino-2-thiomethylbenzene

Abstract

Ruthenium(II) complexes of the bidentate aminothioether ligand, 1-amino-2-thiomethylbenzene (atb), have been synthesised by the direct reaction of atb with different ruthenium-containing starting materials. The complexes are of the type Ru(atb)2X2 [X=Cl (1), X=Br (2)], [Ru(atb)2(PPh3)Cl]Cl (3) and Ru(atb)(bpy)Cl2 (4), and have been characterised by elemental analysis, IR, UV-VIS and NMR spectroscopy. Contrary to the corresponding NiII, PdII, PtII and CuII complexes with the same ligand, these RuII complexes do not suffer demethylation on refluxing in DMF. Their electrochemical behaviour was examined by cyclic voltammetry using a glassy carbon working elctrode and an Ag/AgCl electrode as reference.