A New Coordination Mode of the Photometric Reagent Glyoxalbis(2-hydroxyanil) (H2gbha): Bis-Bidentate Bridging by gbha2-in the Redox Series (μ-gbha)[Ru(acac)2]2n(n= −2, −1, 0, +1, +2), Including a Radical-Bridged Diruthenium(III) and a RuIII/RuIVIntermediate | Publicación