Abstract
TCNQ salts of 1′-monoalkylbiferrocenes showed a temperature-independent trapped-valence state as expected for the unsymmetrical structure of cations. On the other hand, mixed crystals of 1′-monobutyl- and 1′.1‴-dibutylbiferrocenium+(TCNQ) 3 − showed a temperature dependence of the mixed-valence states, showing that the lattice affects the mixed-valence states.
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