Question

Reduction of $2$-butyne with sodium in liquid ammonia gives predominantly

• A. cis-2-butene
• B. trans-2-butene
• C. no reaction
• D. n-butane

Answer 1

Answer: (B)

In presence of $Na+\left(L{i}_2\right)\cdot N{H}_3$. Trans addition of hydrogen on alkene occurs.