Question

choose the suitable reagents for the following reaction:
(A)H2/P+O2
(B)LiAlH4
(C)Li/liq. NH3
(D)Lindlar catalyst​

Answer 1

Answer:

(C)Li/liq. NH3 is the correct option

Explanation:

In the given reaction but-2-yne is changing into trans but-2-ene

Whenever 3 bonds is turning into 2 bonds by addition of hydrogen and the product is in trans form, then Li/liq.NH3 or Na/lig.NH3 is used

❖ Extra information:

⟡ If we get cis as a product, (D)Lindlar catalyst​ is used

• Lindlar catalyst​ contains Pd/BaSO4 (or) CaCO3 containing Sulphur(or) Quinoline. Sulphur and Quinoline are catalytic poison

Hope it helps!

Answer 2

Answer:

(C)Li/liq. NH3

Explanation:

hope it will help you