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Question: Answered & Verified by Expert
2-pentyne on reaction with sodium in liquid ammonia produced compound $A$. What is $A$ ?
ChemistryHydrocarbonsTS EAMCETTS EAMCET 2018 (05 May Shift 2)
Options:
  • A n-pentane
  • B 1-pentyne
  • C cis-2-pentene
  • D trans-2-pentene
Solution:
1117 Upvotes Verified Answer
The correct answer is: trans-2-pentene
$\mathrm{CH}_3-\mathrm{C} \equiv \mathrm{C}-\mathrm{CH}_2-\mathrm{CH}_3-\stackrel{\mathrm{Na}}{\stackrel{\mathrm{LiNH}_3}{\longrightarrow}}$ alkyne on reduction with $\mathrm{Na}$ / Liq $\cdot \mathrm{NH}_3$ produce trans-alkene.

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