Dependence of the Mixed-Valence States on Crystal Form in 1′,1″′-Ditetradecylbiferrocenium Triiodide
Remarkable dependence of the mixed-valence states on crystal form was observed in 1′,1″′-ditetradecylbiferrocenium triiodide. One crystal form showed a temperature-independent trapped-valence state, while the other was found to be a temperature-dependent valence state in which a trapped-valence state at lower temperatures and an averaged-valence state at higher temperatures are observed.