Question

Cyclopentadiene shows acidity while tropene does not. why

Answer 1

When cyclopenta-1,3-diene loses a H+ ion from the 5th carbon, the resulting carboanion is aromatic because of its structure: its cyclic, planar, has a delocalised conjugated pi system which has 4n+2 pi electrons, so it's aromatic. Aromaticity gives stability to the structure, so the formation of the carbanion is favourable and the position of the equilibrium for the reaction is to the right, thus cyclopentadiene is acidic.

Answer 2

Answer:

Answer♡

• When cyclopenta-1,3-diene loses a H+ ion from the 5th carbon, the resulting carboanion is aromatic because of its structure: its cyclic, planar, has a delocalised conjugated pi system which has 4n+2 pi electrons, so it's aromatic. Aromaticity gives stability to the structure, so the formation of the carbanion is favourable and the position of the equilibrium for the reaction is to the right, thus cyclopentadiene is acidic.