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Grade: 12th Pass
        
Adding water in acidic conditions to an alkyne gives methyl ketone as the major product. Plz tell me the reason for this...
5 years ago

Answers : (1)

Adarsh
733 Points
							

As with alkenes, the addition of water to alkynes requires a strong acid, usually sulfuric acid, and is facilitated by mercuric sulfate. However, unlike the additions to double bonds which give alcohol products, addition of water to alkynes gives ketone products ( except for acetylene which yields acetaldehyde ). The explanation for this deviation lies in enol-keto tautomerization, illustrated by the following equation. The initial product from the addition of water to an alkyne is an enol (a compound having a hydroxyl substituent attached to a double-bond), and this immediately rearranges to the more stable keto tautomer.

5 years ago
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