MCQ
$2-$ Butyne react with $Na$ in liquid Ammonia to form
- A$1-$ butene
- B$Cis$ $-2-$ butene
- ✓trans $-2-$ butene
- D$n-$ butane
✓
Answer
Correct option: C.
trans $-2-$ butene
c
When but- $2-$ yne is treated with Na in liquid ammonia, addition of two $\mathrm{H}-$ atoms takes place at the triple bonded carbon atoms in trans manner.
When but- $2-$ yne is treated with Na in liquid ammonia, addition of two $\mathrm{H}-$ atoms takes place at the triple bonded carbon atoms in trans manner.
$\begin{aligned}\mathrm{CH}_{3} \mathrm{C} \equiv \mathrm{CCH}_{3} \frac{\mathrm{Na}}{\mathrm{Liq.NH}_{3}} \mathrm{CH}_{3}-\mathrm{C}=& \mathrm{C}-\mathrm{CH}_{3} \\& \mathrm{H}\end{aligned}$
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