Dinuclear Ruthenium(III)–Ruthenium(IV) Complexes, Having a Doubly Oxido-Bridged and Acetato- or Nitrato-Capped Framework

Dinuclear ruthenium complexes in a mixed-valence state of RuIII–RuIV, having a doubly oxido-bridged and acetato- or nitrato-capped framework, [{RuIII,IV(ebpma)}2(μ-O)2(μ-L)](PF6)2 [ebpma = ethylbis(2-pyridylmethyl)amine; L = CH3COO– (1), NO3– (2)], were synthesized. In aqueous solutions, the diruthenium complex 1 showed multiple redox processes accompanied by proton transfers depending on the pH. The protonated complex of 1, which is described as 1H+, was obtained.