Identify the reagent used for the following c | vedclass

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

Question

(A) The conversion of an internal alkyne $(CH_3-C \equiv C-CH_3)$ to a $cis$-alkene is a stereoselective reduction.Lindlar catalyst ($H_2$ / $Pd$ pois

Vedclass · Accepted Answer

$H_2 / 	ext{Lindlar catalyst}$

Vedclass · Answer

(A) The conversion of an internal alkyne $(CH_3-C \equiv C-CH_3)$ to a $cis$-alkene is a stereoselective reduction.Lindlar catalyst ($H_2$ / $Pd$ poisoned with $CaCO_3$ or $BaSO_4$ and quinoline) is used for the syn-addition of hydrogen to alkynes,which yields the $cis$-isomer.$Na$ / liquid $NH_3$ (Birch reduction) is used for the anti-addition of hydrogen to alkynes,which yields the $trans$-isomer.Therefore,the correct reagent is $H_2$ / Lindlar catalyst.

Identify the reagent used for the following conversion: $CH_3-C \equiv C-CH_3 \longrightarrow \text{cis-but-2-ene}$

Similar Questions

What are $X$ and $Y$ respectively in the following reaction?
$Z$-product $\stackrel{Y}{\longleftarrow} 2$-butyne $\stackrel{X}{\longrightarrow} E$-product

What is the product $A$ in the given reaction?
$C_6H_5-C \equiv C-CH_3 \xrightarrow{H^+ / Hg^{2+}} A$

What happens when a mixture of acetylene and hydrogen is passed over heated Lindlar's catalyst?

Give the hydrogenation and halogenation reactions of alkynes.

The major product of the following reaction is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module