Diruthenium ethynyl complexes 1–3 (1: 1,5‐dithia‐s‐indacene‐4,8‐dione; 2: 4,8‐diethoxybenzo[1,2‐b:4,5‐ b']dithiophene; 3: 4,8‐didodecyloxybenzo[1,2‐b:4,5‐b']dithiophene) have been synthesized by incorporating the respective conjugated heterocyclic spacer and characterized by NMR and elemental analysis. The effects of bridge ligands’ properties on electronic coupling between redox‐active ruthenium terminal groups were investigated by electrochemistry, UV/vis/near‐IR and IR spectroelectrochemistry combined with density functional t...
