Cyclopentadiene Is Unusually Acidic for a Hydrocarbon

question 185

Multiple Choice

Cyclopentadiene is unusually acidic for a hydrocarbon.An explanation for this is the following statement.

• A)The carbon atoms of cyclopentadiene are all sp²-hybridized.
• B)Cyclopentadiene is aromatic.
• C)Removal of a proton from cyclopentadiene yields an aromatic anion.
• D)Removal of a hydrogen atom from cyclopentadiene yields a highly stable free radical.
• E)Removal of a hydride ion from cyclopentadiene produces an aromatic cation.

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