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What is the final primary product when propyne is reacted with methylmagnesium bromide () in dry ethHydrocarbons Chemistry Question

Question

What is the final primary product when propyne is reacted with methylmagnesium bromide ($CH_3MgBr$) in dry ether?

Answer: C

💡 Solution & Explanation

Propyne ($CH_3-C \equiv CH$) is a terminal alkyne and has an acidic hydrogen atom. Grignard reagents like $CH_3MgBr$ act as strong bases and abstract the acidic proton to form an alkane corresponding to the alkyl group of the Grignard reagent. Thus, $CH_3MgBr$ reacts with the acidic proton of propyne to form methane ($CH_4$) and the propynylmagnesium bromide salt.

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