Synthesis and Electrochemical Properties of Mixed‐Metal Triangular Complexes Based on Ferrocene‐Based Ligands and Dinuclear Arene Ruthenium Building Blocks

Abstract

Ferrocene-based multidentate ligands have been widely used as metalloligands in crystal engineering because they selfassemble into mixed-metal complexes with various transitionmetal salts. In the present study, the ferrocene-based ligand 1,2-di(4-pyridylthio)ferrocene (L Fc ) was complexed with dinuclear arene ruthenium building blocks [(p-cymene) 2 Ru 2 (μ-L)](OTf) 2 to form the following trinuclear complexes with triangular structures:benzoquinonato (2 b), and oxalato (3): OTf = trifluoromethanesulfonate]. A similar complexation of the ferrocene-based ligand with [(p-cymene) 2 Ru 2 Cl 4 ] afforded a V-shaped trinuclear complex [(p-cymene) 2 Ru 2 Cl 4 (μ-L Fc )] ( 4). This study reveals the crystal structure and electronic states of 1-4. The absorption wavelengths and redox potentials of the trinuclear complexes depended on the type of L.