Halogenation of Alkynes (1 equiv vs 2 equiv): Mechanism + Exam Traps

Predict alkyne halogenation products: trans dihaloalkenes (1 equiv) vs tetrahalides (2 equiv) via halonium-like intermediates.

• Reaction: Halogenation of Alkynes (1 equiv vs 2 equiv)
• What it does: Predict alkyne halogenation products: trans dihaloalkenes (1 equiv) vs tetrahalides (2 equiv) via halonium-like intermediates.
• Typical reagents: 1 equiv Br2 (CCl4)
• Key intermediate: Varies / context-dependent
• Driving force: Formation of more stable bonds / products
• Exam type: Predict major product
• Exam type: Mechanism choice