Abstract

Abstract The infrared spectra and 57 Fe Mossbauer measurements of a ferrocenecarboxylate functionalized {Cr 3 O} complex in solid state are reported. It was established that conjugation of ferrocene Cp orbitals with the π orbitals of the adjacent carboxylic group stabilizes the trapped mixed-valence state leading to an intriguing coexistence of ferrocene and ferrocenium species giving rise to a new type of compound showing valence tautomerism in the solid state.

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