Question

Choose the reagent to carry out the reaction. $C{{H}_{3}}C\equiv CC{{H}_{3}}\xrightarrow[{}]{{}}\underset{cis\text{ }form}{\mathop{C{{H}_{3}}CH=CHC{{H}_{3}}}}\,$

• A. ${{H}_{2}}+$ Lindlar reagent
• B. $Li+N{{H}_{3}}$
• C. $Conc.\,{{H}_{2}}S{{O}_{4}}$
• D. ${{H}_{2}}O+{{H}^{+}}$

Answer 1

Answer: (A)

${{H}_{2}}+$ Lindlar reagent

Answer 2

Lindlars catalyst gives cis-hydrogenation product.