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User:Barras/Ferrocene
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| ImageFileL1 = Ferrocene.svg
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| ImageFileR1 = Ferrocene-from-xtal-3D-balls.png
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(contracted; show full)rst reported<ref>{{cite journal|year=1951|last1=Kealy|first1=T. J.|last2=Pauson|first2=P. L.|journal=[[Nature (journal)|Nature]]|volume=168|pages=1039|doi=10.1038/1681039b0|issue=4285|title=A New Type of Organo-Iron Compound|bibcode = 1951Natur.168.1039K }}</ref> synthesis of ferrocene used the [[Grignard reaction|Grignard reagent]] cyclopentadienyl magnesium bromide, which can be prepared by reacting [[cyclopentadiene]] with magnesium and [[bromoethane]] in [[anhydrous]] [[benzene]]. [[Iron(II
I) chloride]] is then suspended in anhydrous [[diethyl ether]] and added to the Grignard reagent. An idealized equation for this synthesis is:

:64&nbsp;C<sub>5</sub>H<sub>5</sub>MgBr  +  2&nbsp;FeCl<sub>32</sub>   →   2&nbsp;Fe(C<sub>5</sub>H<sub>5</sub>)<sub>2</sub>  +  64&nbsp;MgBrCl  +  2&nbsp;'''([[C5H5|C<sub>5</sub>H<sub>5</sub>]])<sub>2</sub>'''

Numerous other syntheses have been reported, including the direct reaction of [[gas]]-phase cyclopentadiene with metallic iron<ref>{{cite journal|doi=10.1021/ja01636a080|title=Bis-cyclopentadienyl Compounds of Nickel and Cobalt|year=1954|last1=Wilkinson|first1=G.|authorlink1=Geoffrey Wilkinson|last2=Pauson|first2=P. L.|last3=Cotton|first3=F. A.|authorlink3=F. Albert Cotton|journal=[[J. Am. Chem. Soc.]]|volume=76|pages=1970|issue=7}}</ref> at 350&nbsp;°C or with [[iron pentacarbonyl]].<r(contracted; show full)
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[[Category:Organoiron compounds]]
[[Category:Metallocenes]]
[[Category:Antiknock agents]]
[[Category:Sandwich compounds]]
[[Category:Cyclopentadienyl complexes]]