When propyne (methylacetylene) is passed through a red-hot iron tube at 873 K, it undergoes cyclic t — Aromatic Hydrocarbons Chemistry Question

💡 Solution & Explanation

To minimize steric hindrance between the methyl groups, the three molecules of propyne arrange symmetrically during trimerization, yielding exclusively 1,3,5-trimethylbenzene (Mesitylene).