Pyrazine-bridged trimeric and tetrameric oligomers of triruthenium clusters, [{Ru3O(CH3CO2)6(CO)(py)}-(μ-pz)-{Ru3O(CH3CO2)6(CO)}-(μ-pz)-{Ru3O(CH3CO2)6(py)2}]+ (1) and [{Ru3O(CH3CO2)6(CO)(py)}-(μ-pz)-{Ru3O(CH3CO2)6(CO)}-(μ-pz)-{Ru3O(CH3CO2)6(py)}-(μ-pz)-{Ru3O(CH3CO2)6(dmap)2}]2+ (2), were prepared (pz = pyrazine, py = pyridine, dmap = 4-dimethylaminopyridine). Trimer 1 and tetramer 2 show closely spaced 11 step-12 electron and 14 step-15 electron reversible redox waves, respectively, in their cyclic voltammograms in CH3CN. These compounds were designed specifically to incorporate the above-mentioned electrochemical behavior, using the unique redox properties characteristic of triruthenium clusters: (i) each Ru3 cluster unit generally exhibits four reversible single electron waves from Ru3IV,III,III to Ru3II,II,II state; (ii) the redox potentials of the cluster units strongly depend on the basicity of the ancillary ligand; (iii) redox potentials of the Ru3 cluster units vary by 300–500 mV depending on the presence or the absence of a carbonyl ligand on the cluster unit; (iv) in the negative potential region, electronic interaction through the bridging pyrazine between adjacent Ru3 units containing a carbonyl ligand makes the difference in redox potential of each unit larger. 1 and 2 were synthesized by linking Ru3 cluster units with the desired ancillary ligand set in the appropriate order.