Find in Library

Mono- and binuclear arene–ruthenium(II) complexes with imidazole-containing ligands were prepared by the reaction of the ligands (L¹ = bis(imidazole-1-yl)methane; ImH = 1<i>H</i>-Imidazole; BImH = 1<i>H</i>-Benzimidazole) with [(<i>p</i>-cym)Ru(µ-Cl)₂]₂ dimers. When bis(imidazole-1-yl)methane reacted with [(<i>p</i>-cym)Ru(µ-Cl)₂]₂ in methanol, a binuclear complex of the type [Ru₂(L¹)₂(<i>p</i>-cym)₂Cl₂]Cl₂ (<b>2</b>) with cyclic structure was synthesized, whereas by using acetonitrile as a solvent under the same reaction conditions, an unexpected C–N bond cleavage was observed, and a complex of formula [Ru(ImH)₂(<i>p</i>-cym)Cl]Cl (<b>1</b>) with coordinated imidazole molecules was obtained. Another type of arene–ruthenium complex [Ru(BImH)(<i>p</i>-cym)Cl₂] (<b>3</b>) was obtained by the reaction of benzimidazole and [(<i>p</i>-cym)Ru(µ-Cl)₂]₂. All compounds were characterized by spectral (FT-IR, NMR ¹H, ¹³C) and single-crystal X-ray diffraction methods; their catalytic activity in transfer hydrogenation and the cytotoxicity against MCF-7 and HepG2 cells were evaluated.