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'''Cyclopentadienyl magnesium bromide''' is a [[chemical compound]] with the [[molecular formula]] . The molecule consists of a [[magnesium]] atom bonded to a [[bromine]] atom and a [[cyclopentadienyl]] [[functional group|group]], a ring of five [[carbon]]s each with one [[hydrogen]] atom.
The compound is a [[Grignard reagent]], a class of [[organometallic compounds]] that features a magnesium atom bonded to a halogen atom and to a carbon atom of some [[organic compound|organic]] [[functional group]]. It is of historic importance as the starting material for the first published synthesis of [[ferrocene]] by [[Peter Pauson]] and [[Thomas J. Kealy]] in 1951.<ref name=werner2012/>
==Preparation==
The compound can be prepared by reacting [[cyclopentadiene]] with magnesium and [[bromoethane]] in anhydrous [[benzene]].<ref name=pauson/>
==References==
<references>
<ref name=pauson>P. L. Pauson and T. J. Kealy (1951): "A New Type of Organo-Iron Compound". ''Nature'', volume 168, issue 4285, pages pages1039–1040. </ref>
<ref name=werner2012>H. Werner (2012): "At Least 60 Years of Ferrocene: The Discovery and Rediscovery of the Sandwich Complexes". ''Angewandte Chemie International Edition'', volume 51, issue 25, pages 6052–6058. </ref>
</references>
The compound is a [[Grignard reagent]], a class of [[organometallic compounds]] that features a magnesium atom bonded to a halogen atom and to a carbon atom of some [[organic compound|organic]] [[functional group]]. It is of historic importance as the starting material for the first published synthesis of [[ferrocene]] by [[Peter Pauson]] and [[Thomas J. Kealy]] in 1951.<ref name=werner2012/>
==Preparation==
The compound can be prepared by reacting [[cyclopentadiene]] with magnesium and [[bromoethane]] in anhydrous [[benzene]].<ref name=pauson/>
==References==
<references>
<ref name=pauson>P. L. Pauson and T. J. Kealy (1951): "A New Type of Organo-Iron Compound". ''Nature'', volume 168, issue 4285, pages pages1039–1040. </ref>
<ref name=werner2012>H. Werner (2012): "At Least 60 Years of Ferrocene: The Discovery and Rediscovery of the Sandwich Complexes". ''Angewandte Chemie International Edition'', volume 51, issue 25, pages 6052–6058. </ref>
</references>
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