Thiolato-Bridged Ru~(II)Ru~(II)Trinuclear Complex Composed of Bis(bipyridine)ruthenium(II)Units with Chelating 2-Aminoethanethiolate:Conversion to a Disulfide-Bridged Ru~(II)Ru~(II)Dinuclear Complex

摘要

The reaction of[Ru(solvent)_2(bpy)_2]~(2+)(bpy=2,2'-bipyridine)with Haet(2-aminoethanethiol)in ethanol/water in the presence of Ag~+gave a thiolato-bridged Ru~(II)Ag~IRu~(II)trinuclear complex,[Ag{Ru-(aet)(bpy)_2}_2]~(3+),in which two[Ru~(II)(aet)(bpy)_2]~+units are linked by an Ag~I atom.When this complex was treated with HCl in acetonitrile/water,a disulfide-bridged Ru~(II)Ru~(II)dinuclear complex,[Ru2(cysta)(bpy)_4]~(4+)(cysta=cystamine),was produced as a result of the removal of an Ag~I atom and the autoxidation of thiolato groups.It was found that the dinuclear structure in[Ru2(cysta)-(bpy)_4]~(4+)is reverted back to[Ag{Ru(aet)(bpy)_2}_2]~(3+)by treatment with Ag~+assisted by Zn reduction.