Difference between revisions 6001797 and 6001798 on simplewiki

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| ImageFileR1 = Ferrocene-from-xtal-3D-balls.png
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(contracted; show full)[Mössbauer spectroscopy]]. Each cyclopentadienyl (Cp) ring is then allocated a single negative charge, bringing the number of π-electrons on each ring to six, and thus making them [[Aromaticity|aromatic]]. These twelve electrons (six from each ring) are then shared with the metal via covalent bonding.  When combined with the six d-electrons on Fe<sup>2+</sup>, the complex attains an [[18-electron rule|18-electron]] configuration.

==Synthesis and handling properties==
The first reported synthes
ies of ferrocene were nearly simultaneous.  Pauson and Kealy synthesised ferrocene using [[iron(III) chloride]] and a [[Grignard reaction|Grignard reagent]], cyclopentadienyl magnesium bromide.  Iron(III) chloride is suspended in [[anhydrous]] [[diethyl ether]] and added to the Grignard reagent, which is prepared by reacting [[cyclopentadiene]] with magnesium and [[bromoethane]] in anhydrous [[benzene]].<ref name = "Pauson_Kealy" />  An iron(III) salt was chosen as they sought to couple the cy(contracted; show full)
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[[Category:Organoiron compounds]]
[[Category:Metallocenes]]
[[Category:Antiknock agents]]
[[Category:Sandwich compounds]]
[[Category:Cyclopentadienyl complexes]]