Question

Choose the correct set of reagents for the following conversion trans $\left( Ph - CH = CH - CH _3\right) \rightarrow \operatorname{cis}\left( Ph - CH = CH - CH _3\right)$

• A. $Br _2$, alc $\cdot KOH , NaNH _2, Na \left( Liq NH _3\right)$
• B. $Br _2$, alc $\cdot KOH , NaNH _2, H _2$ Lindlar Catalyst
• C. $Br _2$, aq $\cdot KOH , NaNH _2, H _2$ Lindlar Catalyst
• D. $Br _2, aq \cdot KOH , NaNH _2, Na \left( Liq NH _3\right)$

Answer 1

Answer: (B)

$Br _2$, alc $\cdot KOH , NaNH _2, H _2$ Lindlar Catalyst

Answer 2

So, the correct option is (b) Br2​, alc ⋅KOH, NaNH2​, H2​ Lindlar Catalyst