Thiopurines bis(S-8-thiotheophylline)methane (MBTTH2), 1,2-bis(S-8thiotheophylline)ethane (EBTTH2) and 1,3-bis(S-8-thiotheophylline)propane (PBTTH2) were reacted with [RuClCp(mPTA)2](CF3SO3)2 in water to afford the biruthenium complexes [{RuCp(mPTA)2}2-µ-(L-kN7,N´7)](CF3SO3)4 (1: L = MBTT; 2: L = EBTT; 3: L = PBTT), which have been characterized by elemental analysis, IR and NMR multinuclear ( 1 H, 13 C{ 1 H}, 31 P{ 1 H} and 19 F{ 1 H}) spectroscopy. Diffusion experiments for 1 were carried out. Proposed structures for the three complexes were also supported by theoretical calculations. Their cyclic voltammetry showed that all these complexes are characterized by two one-electron irreversible oxidative responses (Ru
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