Syntheses and Properties of 1′,1″″-Diphenylbiferrocene and Its Mixed-valence Salt

Abstract A binuclear ferrocenyl derivative with phenyl groups and its mixed-valence triiodide salt were prepared. The 57Fe-Mössbauer spectra of the triiodide salt show that the temperature dependence of mixed-valence state is different from that of biferrocenium triiodide but rather similar to those of dialkylbiferrocenium salts which show an averaged-valence state at high temperatures.