Control of the symmetry of binuclear ferrocene derivative by using chiral substituent and its mixed-valence state

Abstract

The mixed-valence 1′,1′′′-bis(( R)-2-phenylbutyl)-, 1′,1′′′-bis(( S)-2-phenylbutyl)- and 1′-(( R)-2-phenylbutyl)-1′′′-(( S)-2-phenylbutyl)-1,1′′-biferrocenium salts were investigated to reveal the importance of cation symmetry on the mixed-valence states. ( R, R) and ( S, S) samples never showed the perfect valence detrapping, while ( R, S) sample showed the detrapped-valence state at room temperature.