The dinuclear bis(ferrocenecarboxylato) complex Ru 2 (CO) 4 (μ-OOCFc) 2 (py) 2 (Fc=ferrocenyl, py=pyridine) was found to react with aromatic diimines (2,2′-dipyridyl, 4,4′-dimethyl-2,2′-dipyridyl, 1,10-phenanthroline, 5-nitro-1,10-phenanthroline, and 5-amino-1,10-phenanthroline) in methanol to give the cationic diruthenium complexes [(N∩N) 2 Ru 2 (CO) 2 (μ-CO) 2 (μ-OOCFc)] + (1: N∩N=2,2′-dipyridyl, 2: N∩N=4,4′-dimethyl-2,2′-dipyridyl, 3: N∩N=1,10-phenanthroline, 4: N∩N=5-nitro-1,10-phenanthroline, 5: N∩N=5-amino-1,10-phenanthroline), which have been isolated as the hexafluorophosphate salts. The molecular structure of 3, solved by single-crystal X-ray analysis of the tetraphenylborate salt [3][BPh 4 ], shows a diruthenium backbone bridged by two carbonyl and by one ferrocenecarboxylato ligand, the two 1,10-phenanthroline ligands being in the axial positions. Cyclic voltammetry in dichloromethane reveals for all compounds two successive oxidations due to ferrocene/ferrocenium redox couple and oxidation of the diruthenium core.