Cyclopentadienyl magnesium bromide is a chemical compound with the molecular formula .mw-parser-output .template-chem2-su{display:inline-block;font-size:80%;line-height:1;vertical-align:-0.35em}.mw-parser-output .template-chem2-su>span{display:block;text-align:left}.mw-parser-output sub.template-chem2-sub{font-size:80%;vertical-align:-0.35em}.mw-parser-output sup.template-chem2-sup{font-size:80%;vertical-align:0.65em}C5H5MgBr. The molecule consists of a magnesium atom bonded to a bromine atom and a cyclopentadienyl group, a ring of five carbons each with one hydrogen atom.
The compound is a Grignard reagent, a type of organometallic compound that features a magnesium atom bonded to a halogen atom and to a carbon atom of some organic functional group.
This compound is of historic importance as the starting material for the first published synthesis of ferrocene by Peter Pauson and Thomas J. Kealy in 1951.
The compound can be prepared by reacting cyclopentadiene with magnesium and bromoethane in anhydrous benzene.
MgCpBr
(TiCp2Cl)2
TiCpCl3
TiCp2S5
TiCp2(CO)2
TiCp2Me2
VCpCh
VCp2Cl2
VCp(CO)4
(CrCp(CO)3)2
Fe(i5-C5H4Li)2
((C5H5)Fe(C5H4))2
(C5H4-C5H4)2Fe2
FeCp2PF6
FeCp(CO)2I
CoCp(CO)2
NiCpNO
ZrCp2ClH
MoCp2Cl2
(MoCp(CO)3)2
RuCp(PPh3)2Cl
RuCp(MeCN)3PF6
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