What is the final primary product when propyne is reacted with methylmagnesium bromide () in dry eth β Hydrocarbons Chemistry Question
Question
What is the final primary product when propyne is reacted with methylmagnesium bromide ($CH_3MgBr$) in dry ether?
Answer: C
π‘ 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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