First slide

Alkynes

Question

The reagent needed to convert 2-butyne to cis-2-butene is:

Moderate

A

$H_{2} / Pt$
B

$H_{2} / Lindlar's catalyst$
C

$Li / {NH}_{3}$
D

$Na / {NH}_{3}$

Solution

Lindlar's catalyst is best for preparation of cis alkene.

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