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Question
How will you bring about the following conversion?
Propene to propyne
Solution
\[\begin{array}{cc}
\ce{\underset{Propene}{CH3CH = CH2} ->[Br2/CCl4] CH3 - CH - CH2 ->[NaNH2/liq. NH3, 196 K][-2HBr] \underset{propyne}{CH3 - C ≡ CH}}\\
\phantom{.}|\phantom{......}|\phantom{.......}\\
\ce{\underset{1-2-Dibromopropane}{Br\phantom{....}Br\phantom{.....}}}
\end{array}\]
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