Ferrocenium tetrafluoroborate

<p>Ferrocenium tetrafluoroborate is an <a href="/facts/Organometallic_compound/bhqFz2P0">organometallic compound</a> with the formula [Fe(C5H5)2]BF4.  This salt is composed of the cation [Fe(C5H5)2]+ and the <a href="/facts/Tetrafluoroborate/46EEToo6">tetrafluoroborate</a> <a href="/facts/Anion/wrbwhF3z">anion</a> (BF−4).  The related <a href="/facts/Hexafluorophosphate/mXYXC2Bf">hexafluorophosphate</a> is also a popular reagent with similar properties.  The ferrocenium cation is often abbreviated Fc+ or <a href="/facts/Cyclopentadienide/11slGTQo">Cp</a>2Fe+.  The salt is deep blue in color and <a href="/facts/Paramagnetic/vj1SMbbp">paramagnetic</a>.
Ferrocenium salts are sometimes used as one-electron oxidizing agents, and the reduced product, <a href="/facts/Ferrocene/jKtu9Cp8">ferrocene</a>, is inert and readily separated from ionic products.  The ferrocene–ferrocenium couple is often used as a reference in electrochemistry.  The standard potential of ferrocene-ferrocenium is dependent on specific electrochemical conditions.
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Ferrocenium tetrafluoroborate open-in-new

Ferrocenium tetrafluoroborate