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Electron Delocalization in a New Mixed‐Valence σ‐Bridged Biferrocenium Cation
Author(s) -
Dong TengYuan,
Lee TingYu
Publication year - 1992
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199200007
Subject(s) - chemistry , metallocene , valence (chemistry) , delocalized electron , electrochemistry , electron , electron delocalization , mössbauer spectroscopy , electron transfer , valence electron , crystallography , polymer , organic chemistry , polymerization , physics , electrode , quantum mechanics
The physical properties of mixed‐valence 1,3‐diferrocenyl‐propan‐1‐one (1) are reported. The Mössbauer spectrum of mixed‐valence cation 1 at 300 K shows two doublets, one for a Fe 11 metallocene (ΔE Q = 2.192 mm s −1 ) and the other for a Fe III metallocene (ΔE O = 0.179 mm s −1 ) Thus, the thermal electron‐transfer rate in 1 is less than the time scale of the Mössbauer technique (∼10 7 s −1 ). Furthermore, the NMR, electrochemical IR, and near‐IR data conclusively indicate that there is no significant interaction between the two ferrocenyl moieties.