In the cyclic polymerization of ethyne () to benzene () via a red-hot iron tube, what is the stoichiometric coefficient of ethyne in the balanced chemical equation?

Question

In the cyclic polymerization of ethyne ($C_2H_2$) to benzene ($C_6H_6$) via a red-hot iron tube, what is the stoichiometric coefficient of ethyne in the balanced chemical equation?

Prashant Kotian · Accepted Answer

Correct answer: 3. The reaction involves three molecules of ethyne undergoing cyclic trimerization. The balanced chemical equation is . The three triple bonds break and form alternating single and double bonds to construct the aromatic ring.

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