The most suitable reagent for the following conversion, is:
- ANa/liquid NH3
- BH
2
,Pd/C, quinoline - CZn/HCl
- DHg
2+
/H
+
,H
2
O
Solution & Step-by-step Explanation
1. Lindlar's Catalyst (H
2
,Pd/C, quinoline or CaCO
3
) performs partial hydrogenation of alkynes to produce cis-alkenes.
2. Birch Reduction (Na/liquid NH
3
) reduces alkynes to produce trans-alkenes.
Therefore, for cis-2-butene, the Lindlar's catalyst is used.
2
,Pd/C, quinoline or CaCO
3
) performs partial hydrogenation of alkynes to produce cis-alkenes.
2. Birch Reduction (Na/liquid NH
3
) reduces alkynes to produce trans-alkenes.
Therefore, for cis-2-butene, the Lindlar's catalyst is used.