JEE Main Chemistry question
Propyne + H₂O →(HgSO₄, 333 K, dil. H₂SO₄) X →(Ba(OH)₂) Y →(H⁺/Δ) Z. The ratio of the number of σ and π bonds in the final product Z is .
Answer: 8
Solution
Markovnikov hydration of propyne gives acetone (X, via the enol tautomer). Base-catalyzed (Ba(OH)₂) aldol addition of two acetone molecules gives diacetone alcohol (Y). Acid-catalyzed dehydration (H⁺/Δ) gives mesityl oxide,
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