Which among the following is the strongest ac | vedclass

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(A) The acidity of a compound depends on the stability of its conjugate base. When cyclopentadiene loses a proton $(H^+)$,it forms a cyclopentadienyl

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Cyclopentadiene

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(A) The acidity of a compound depends on the stability of its conjugate base. When cyclopentadiene loses a proton $(H^+)$,it forms a cyclopentadienyl anion. This anion has $6 \pi$ electrons and is cyclic and planar,making it aromatic according to $H$ückel's rule. Since the conjugate base is aromatic,it is exceptionally stable,which makes cyclopentadiene the strongest acid among the given options.

Which among the following is the strongest acid?

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