A series of trans-heteroleptic paddlewheel-type diruthenium(II,II) complexes [Ru2(2,6-(CF3)2PhCO2)2(p-RPhCO2)2-(THF)2] was synthesized by substituting para-R-substituted benzoate ligands (p-RPhCO21, R = CF3, Cl, F, H, Ph, Me, MeO, OH) in [Ru2(p-RPhCO2)4(THF)2] with 2,6-bis(trifluoromethyl)-benzoate (2,6-(CF3)2PhCO21). The redox potential (E1/2) for the [Ru2II,II]/[Ru2II,III]+ couple and the HOMO energy level were linearly dependent on the acidity (pKa) of the substituted benzoic acids (p-RPhCO2H) and Hammett constants of p-R substitution groups.
- Electron-donation ability
- Trans-Heteroleptic paddlewheel-type diruthenium complex
ASJC Scopus subject areas