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Ferrocene Preparation -

Ferrocene Preparation Introduction: The purpose of the lab is to prepare ferrocene from ferrous chloride and cyclopentadiene. Ferrocene, an organometallic, is a combination of two cyclopentadienide ions with a ferrous cation, such that the six pi electrons binds every carbon equally to the metal forming a sandwich type structure. Ferrocene has the properties of both an activated benzene (undergoes electrophilic substitution reactions) and a ferrous ion (oxidation reaction). Glyme and DMSO are used as solvents as they have moderate polarity so they would break up KOH into K+ and OH-, without breaking the hydrogen bonding in the hydroxide ion. Cyclopentadiene is relatively acidic so a strong base would be needed to abstract a proton to form the cyclopentadienide anion (OH- from KOH).