Question

The reduction of 4-octyne with $H_2$ in the presence of $Pd/BaS{O}_4$ and quinoline gives :

• A. trans-4-octene
• B. cis-4-octene
• C. a mixture of cis and trans-4-octene
• D. a completely reduced product $C_8{H}_{18}$

Answer 1

The correct option is B cis-4-octene

Reduction of alkyne with $H_2$ and $Pd/BaS{O}_4$ gives cis-alkene. The reaction is shown below.

The reagent known as Lindlar's catalyst.

Option B is correct.