# What is Lindlars catalyst?

Pd on $C a C {O}_{3}$ or $B a S {O}_{4} + P b {\left(C {H}_{3} C O O\right)}_{2} +$quinoline $\Rightarrow \textcolor{b l u e}{\text{Lindlar catalyst}}$.
alkene. It is used to prepare cis alkene from an alkyne and ${H}_{2}$.
• $\Rightarrow$A less active Pd catalyst is used where Pd is adsorbed onto $C a C {O}_{3}$ or $B a S {O}_{4}$ { Pd is poisoned} with added lead acetate and quinoline.
• With Lindlar catalyst, 1 mole of ${H}_{2}$, adds to an alkene and cis