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Terminal alkynes (RC-=CH) are not reduce...

Terminal alkynes `(RC-=CH)` are not reduced by alkali metals (e.g., Na, K, or Li) in liq. `NH_3`, but reduction takes place when `(NH_4)_2SO_4` is added in the reaction mixture. Explain why.

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AI Generated Solution

To explain why terminal alkynes `(RC≡CH)` are not reduced by alkali metals (like Na, K, or Li) in liquid ammonia, but reduction occurs when `(NH₄)₂SO₄` is added, we can break down the process step by step. ### Step-by-Step Solution: 1. **Understanding Terminal Alkynes**: Terminal alkynes have a triple bond between carbon atoms, with one of the carbons being attached to a hydrogen atom. The general structure is `RC≡CH`. 2. **Role of Alkali Metals in Liquid Ammonia**: ...
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