Inorganic Chemistry, Vol.43, No.16, 4825-4832, 2004
Synthesis, structural, spectroscopic, and electrochemical characterization of high oxidation state diruthenium complexes containing four identical unsymmetrical bridging ligands
Six Ru-2(6+) derivatives of the form Ru-2(L)(4)(CdropCC(6)H(5))(2), where L = 2-Fap, 2,3-F(2)ap, 2,4-F(2)ap, 2,5-F(2)ap, 3,4-F(2)ap, or 2,4,6-F(3)ap, are synthesized and characterized as to their electrochemical, spectroscopic, and/or structural properties. These compounds are synthesized from a reaction between LiCdropCC(6)H(5) and Ru-2(L)(4)Cl. Two of the investigated complexes exist in a (4,0) isomeric form while four adopt a (3,1) geometric conformation. These two series of geometric isomers are compared with previously characterized (4,0) Ru-2(ap)(4)(CdropCC(6)H(5))(2), (4,0) Ru-2(F(5)ap)(4)(CdropCC(6)H(5))(2), and (3,1) Ru-2(F(5)aP)(4)(CdropCC(6)H(5))(2). The overall data on the nine compounds thus provide an opportunity to systematically examine how the electrochemical and structural properties of these Ru-2(6+) complexes vary with respect to isomer type and electronic properties of the bridging ligands.