Question Detail
Question
What is the product when 2‑butyne is treated with excess Br₂?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Two equivalents of Br₂ add to the triple bond: first gives 2,3‑dibromo‑2‑butene, second gives 2,2,3,3‑tetrabromobutane.
Hint
Two equivalents of Br₂ add across the triple bond.