Abstract
57Fe NMR-spectra of 28 mono and disubstituted ferrocenes with a natural abundance of57Fe have been measured relative to internal ferrocene. Most of the resonances appear at the high frequency side. The shielding influence of the various substituents is discussed qualitatively.57Fe shifts are very sensitive to ring tilting as occurring in [3]ferrocenophanes.
Zusammenfassung
57Fe-NMR-Signale von 28 mono- und disubstituierten Ferrocenen mit natürlicher Häufigkeit an57Fe wurden gegen Ferrocen als innerem Standard gemessen. Die meisten Resonanzen sind zu höherer Frequenz verschoben. Die57Fe-Verschiebung reagiert sehr empfindlich auf Ringneigung, wie an [3]Ferrocenophanen gezeigt wurde. Substituenteneinflüsse auf die Verschiebung werden qualitativ diskutiert.
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For a preliminary communication see Ref.2. Parts of this work were presented at the “NMR-Diskussionstagung” in Dortmund in January 1982 (byE. H.) and at “GERM VI” in Pont à Mousson in March 1982 (byW. R.).
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Haslinger, E., Koci, K., Robien, W. et al. Ferrocene derivatives, part 6757Fe-NMR spectroscopy of ferrocenes. Monatsh Chem 114, 495–499 (1983). https://doi.org/10.1007/BF00798447
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DOI: https://doi.org/10.1007/BF00798447