Synthesis and characterization of (CHCH)n-bridged (n = 1, 2, 3) heterobimetallic and trimetallic ferrocene-ruthenium complexes

A series of heterobimetallic and trimetallic ferrocene-ruthenium complexes have been prepared. Electrochemical studies have revealed that intermetallic electronic communication between the two endgroups is attenuated with the increase of the length of the conjugated bridge. The electrochemical behavior of trimetallic complex reveals that strong electronic communication between ruthenium and ferrocene transmitted through the ethenyl bridge, however very weak interaction between ruthenium and ferrocene transmitted through the (E)-CHCH-Py bridge.