What will be the major product of the followi | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Step $1$: The terminal alkyne $n-Bu-C \equiv CH$ reacts with $n-BuLi$ to form the acetylide anion $n-Bu-C \equiv C^- Li^+$.Step $2$: The acetylide

Vedclass · Accepted Answer

Vedclass · Answer

(C) Step $1$: The terminal alkyne $n-Bu-C \equiv CH$ reacts with $n-BuLi$ to form the acetylide anion $n-Bu-C \equiv C^- Li^+$.Step $2$: The acetylide anion undergoes an $S_N2$ reaction with $n-C_5H_{11}Cl$ to form the internal alkyne $n-Bu-C \equiv C-C_5H_{11}$.Step $3$: The hydrogenation of the internal alkyne using $Lindlar$ catalyst and $H_2$ results in the formation of a $cis$-alkene.Therefore,the major product is the $cis$-isomer where the $n-Bu$ and $C_5H_{11}$ groups are on the same side of the double bond,which corresponds to option $C$.

What will be the major product of the following sequence of reactions?
$n-Bu-C \equiv CH \xrightarrow[(ii) \text{Lindlar cat.}, H_2]{(i) n-BuLi, n-C_5H_{11}Cl}$

Similar Questions

Ethyl phenyl acetylene ($1$-phenyl-but-$1$-yne) on reduction with partially deactivated palladised charcoal (Lindlar's catalyst) gives:

$CH_3-CH(CH_3)-CH=CH_2 \xrightarrow{DBr} \text{Product (Major)}$. The product will be:

Identify the major product $A$ and major product $B$ in the following set of reactions:
$CH_3-CH=CH_2 \xrightarrow{H_2O, H^+} \text{Major product } A$
$CH_3-CH=CH_2 \xrightarrow{(BH_3)_2, H_2O_2, OH^-} \text{Major product } B$

Identify the $(C)$ product of the following reaction:

Consider the following reactions:
$X + HCl \xrightarrow{\text{Anhydrous } AlCl_3} C_2H_5Cl$ (Addition)
$Y \xrightarrow{\text{Anhydrous } ZnCl_2 / HCl} C_2H_5Cl$ (Substitution)
$Y$ can be converted to $X$ on heating with $...$ at $...$ temperature:

Vedclass Test Series

Exam Paper Generator

Online Exam Module

What will be the major product of the following sequence of reactions?$n-Bu-C \equiv CH \xrightarrow[(ii) \text{Lindlar cat.}, H_2]{(i) n-BuLi, n-C_5H_{11}Cl}$