Synthesis, Structural, Spectroscopic, and Electrochemical Characterization of High Oxidation State Diruthenium Complexes Containing Four Identical Unsymmetrical Bridging Ligands

Six Ru26+ derivatives of the form Ru2(L)4(C⋮CC6H5)2, where L = 2-Fap, 2,3-F2ap, 2,4-F2ap, 2,5-F2ap, 3,4-F2ap, or
2,4,6-F3ap, are synthesized and characterized as to their electrochemical, spectroscopic, and/or structural properties.
These compounds are synthesized from a reaction between LiC⋮CC6H5 and Ru2(L)4Cl. 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) Ru2(ap)4(C⋮CC6H5)2, (4,0) Ru2(F5ap)4(C⋮CC6H5)2, and (3,1) Ru2(F5ap)4(C⋮CC6H5)2. The overall data on the nine compounds thus provide an opportunity
to systematically examine how the electrochemical and structural properties of these Ru26+ complexes vary with
respect to isomer type and electronic properties of the bridging ligands.