for-the-addition-of-br2-and-cl2-to-alkynes-trans-addition-is-highly-favored-howe

Question

For the addition of Br₂ and Cl₂ to alkynes, trans addition is highly favored. However, more of the syn addition product is produced with chlorination. Justify this fact.

Diagram showing alkyne halogenation with Br2 and Cl2, illustrating product formation.

Accepted Answer

Because chlorine is smaller and less sterically hindered than bromine.

Answer

Because chlorine is bigger and more sterically hindered than bromine.

Answer

Because addition of chlorine would follow different mechanism.

Answer

Because reaction with chlorine would under elimination reaction instead.

For the addition of Br2 and Cl2 to alkynes, trans addition is highly favored. However, more of the syn addition product is produced with chlorination. Justify this fact.

For the addition of Br₂ and Cl₂ to alkynes, trans addition is highly favored. However, more of the syn addition product is produced with chlorination. Justify this fact.