Among the following cyclic hydrocarbons, which one is the most acidic?

Step-by-step solution

Acidity of a hydrocarbon is directly proportional to the stability of the conjugate base formed after the removal of a proton ( H^+ ). Let us evaluate the conjugate bases of the given hydrocarbons: 1. Cycloheptatriene: Deprotonation gives the cycloheptatrienyl anion, which has 8 electrons and is anti-aromatic (highly unstable). 2. Cyclopropene: Deprotonation gives the cyclopropenyl anion, which has 4 electrons and is anti-aromatic. 3. Cyclopentadiene: Deprotonation gives the cyclopentadienyl anion, which has 6 elec