Hydration of alkynes (using dilute and ) yields carbonyl compounds. While ethyne yields acetaldehyde, what do all other terminal alkynes (like propyne) strictly yield?

Question

Hydration of alkynes (using dilute $H_2SO_4$ and $HgSO_4$) yields carbonyl compounds. While ethyne yields acetaldehyde, what do all other terminal alkynes (like propyne) strictly yield?

Prashant Kotian · Accepted Answer

Correct answer: B. Hydration of alkynes follows Markovnikov's rule. The adds to the more substituted carbon, forming an enol that tautomerizes strictly to a ketone (specifically a methyl ketone for terminal alkynes).

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