The cyclic polymerization of ethyne into benzene requires passing the alkyne gas through a red-hot i — Hydrocarbons Chemistry Question

💡 Solution & Explanation

Cyclic polymerization of terminal alkynes is a high-temperature process. Passing ethyne gas through a red-hot iron tube at exactly 873 K provides the necessary activation energy for the three $\pi$ bonds to break and reform into the continuous $\sigma$ and delocalized $\pi$ framework of the benzene ring.