Английская Википедия:Ferrocenium hexafluorophosphate
Ferrocenium hexafluorophosphate is an organometallic compound with the formula [Fe(C5H5)2]PF6. This salt is composed of the cation [Fe(C5H5)2]+ and the hexafluorophosphate anion (Шаблон:Chem). The related tetrafluoroborate is also a popular reagent with similar properties. The ferrocenium cation is often abbreviated Fc+ or Cp2Fe+. The salt is deep blue in color and paramagnetic.
Ferrocenium salts are one-electron oxidizing agents, and the reduced product, ferrocene, is relatively inert and readily separated from ionic products. The ferrocene–ferrocenium couple is often used as a reference in electrochemistry. In acetonitrile solution that is 0.1 M in NBu4PF6, the Fc+/Fc couple is +0.641 V with respect to the normal hydrogen electrode.[1]
Preparation and structure
Commercially available, this compound may be prepared by oxidizing ferrocene with ferric salts followed by addition of hexafluorophosphoric acid.[1]
The compound is monoclinic with well-separated cation and anion; the Шаблон:Chem may rotate freely. The average Fe-C bond length is 2.047 Å, which is virtually indistinguishable from the Fe-C distance in ferrocene.[2]
References
Шаблон:Iron compounds Шаблон:Hexafluorophosphates Шаблон:Cyclopentadienide complexes
- ↑ 1,0 1,1 Шаблон:Cite journal
- ↑ Ошибка цитирования Неверный тег
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