Question

Complete the following reaction by identifying $X$ and $Y$.
$CH_3CH_2C \equiv CH \xrightarrow{NaNH_2} X\xrightarrow{C_2H_5Br} Y$

• A. $X = CH_3CH_2COONa$, $Y = CH_3CH_2CH = CH_2$
• B. $X = CH_3CH_2C \equiv CNa$, $Y = CH_3CH_2C \equiv CC_2H_5$
• C. $X = CH_3CH_2CH_2CH_2Na$, $Y = CH_3CH_2CH_2CH_3$
• D.

Answer 1

Answer: (B)

1-Butyne on reaction with $C _{2} H _{5} Br$ in the presence of $NaNH _{2}$ forms hex-3-yne.
$CH _{3} CH _{2}- C \equiv CH \xrightarrow{ NaNH _{2}}CH _{3} CH _{2}-\underset{(X)}{ C } \equiv C ^{-} Na ^{+} \xrightarrow{ C _{2} H _{5} Br }$
$CH _{3} CH _{2}- \underset{(Y)}{C \equiv C} - CH _{2} CH _{3}$