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User:Barras/Ferrocene
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| Verifiedfields = changed
| verifiedrevid = 457631192
| ImageFileL1 = Ferrocene.svg
| ImageSizeL1 = 80 px
| ImageFileR1 = Ferrocene-from-xtal-3D-balls.png
| ImageSizeR1 = 120 px
| ImageFileL2 = Ferrocene 3d model 2.png
(contracted; show full)
Ferrocene was first prepared unintentionally. In 1951, Pauson and Kealy at [[Duquesne University]] reported the reaction of cyclopentadienyl magnesium bromide and [[iron(III) chloride|ferric chloride]] with the goal of oxidatively coupling the diene to prepare [[fulvalene]]. Instead, they obtained a light orange powder of "remarkable stability.".<ref name = "Pauson_Kealy">{{cite journal|
authorfirst1 = T. J. Kealy, P. L.|last1 = Kealy|first2 = P. L.|last2 = Pauson|title = A New Type of Organo-Iron Compound|journal = [[Nature (journal)|Nature]]|year = 1951|volume = 168|pages = 1039|doi = 10.1038/1681039b0 |issue = 4285|bibcode = 1951Natur.168.1039K}}</ref> 
(contracted; show full)urnal = [[Journal of the American Chemical Society]] |year = 1952|volume = 74 |pages = 2125–2126 |doi = 10.1021/ja01128a527 |issue = 8}}</ref> Independently [[Ernst Otto Fischer]] also came to the conclusion of the sandwich structure and started to synthesize other metallocenes such as [[nickelocene]] and [[cobaltocene]].<ref>{{cite journal |author = E. O. Fischer, W. Pfab |title = Zur Kristallstruktur der Di-Cyclopentadienyl-Verbindungen des zweiwertigen Eisens, Kobalts und Nickels |journal = 
[[Zeitschrift für Naturforschung B]] |year = 1952 |volume = 7 |pages = 377–379 |doi =}}</ref>

The structure of ferrocene was confirmed by [[Nuclear magnetic resonance|NMR]] spectroscopy and [[X-ray crystallography]].<ref name=r1/><ref>{{cite journal|author=Dunitz, J. D., Orgel, L. E.|title=Bis-Cyclopentadienyl&nbsp;– A Molecular Sandwich|journal= [[Nature (journal)|Nature]] |year=1953| volume=171 |pages= 121–122|doi = 10.1038/171121a0|issue=4342}}</ref><ref>{{cite journal |author = J. Dunitz, L. Orgel, A. Ri(contracted; show full)[[ru:Ферроцен]]
[[fi:Ferroseeni]]
[[sv:Ferrocen]]
[[th:เฟอร์โรซีน]]
[[tr:Ferrosen]]
[[uk:Фероцен]]
[[ur:Ferrocene]]
[[zh:二茂铁]]