Syntheses, structure, and electrochemical properties of homo-metallic binuclear complexes containing ferrocenyl–ethynyl spacers

The preparations and the electrochemical measurements of multinuclear complexes assembled from ethynylferrocene(s) redox-active subunit end-capping with [(η5-C5R5)(P2)M] metallic centers are described. Based on the correlation between the ΔE1/2 value and the second redox potential of the end-capping metallic centers, a qualitative explanation for the magnitude of the electronic coupling in the series complexes is given.