Inorganic Chemistry, Vol.33, No.17, 3621-3624, 1994
Bis(4,4’-bis(Diethylamino)-2,2’-Bipyridine)Dichlororuthenium(III) - A New Starting Material for Ruthenium Polypyridyl Complexes Exhibiting Low Redox Potentials
The synthesis and characterization of [Ru((Et2N)2bpy)2Cl2]Cl, where (Et2N)2bpy is 4,4’-bis(diethylamino)-2,2’-bipyridine, is described. The utility of this complex as a starting material is illustrated by the syntheses of [Ru((Et2N)2bpy)2(bpy)](PF6)2 and [Ru((Et2N)2bpy)2(py-bzimH)](PF6)2, where bpy is 2,2’-bipyridine and py-bzimH is 2-(2-pyridyl)benzimidazole. The bis-(Et2N)2bpy complexes are noteworthy because of their low Ru(III/II) potentials. The (Et2N)2bpy complexes also undergo ligand-localized oxidations which may influence the Ru(III/II) couple. An improved synthesis of the (Et2N)2bpy ligand is also reported.