HydrocarbonsmediumMCQ SINGLE

When propyne is treated with aqueous in presence of , the major product isHydrocarbons Chemistry Question

Question

When propyne is treated with aqueous $H_2SO_4$ in presence of $HgSO_4$, the major product is

Answer: C

💡 Solution & Explanation

2 4 4 . / dil H SO HgSO is the reagent used for oxymercuration and demercuration. It works on the principle of Markownikoff’s addition. As per this rule, hydronium ion goes to the carbon bearing more number of hydrogens. The first step leads to the Markownikoff product due to the formation of stable carbocation as a reactive intermediate,while in the second step, keto- enol tautomerism takes place. Therefore, acetone will be a favorable product.

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