Lindlar catalyst
Catalyst enabling the hydrogenation of alkynes to alkenes
Lindlar catalyst
A Lindlar catalyst is a heterogeneous catalyst used for the hydrogenation of alkynes to alkenes without further reduction into alkanes (i.e. chemoselective semihydrogenation). It consists of palladium deposited on calcium carbonate (CaCO3) or barium carbonate (BaCO3), which is then poisoned with various forms of lead. This poisoning serves to deactivate the catalyst, so that that the more reactive alkyne bonds are attacked while the alkenes are spared. It is named after its inventor Herbert Lindlar, who discovered it in 1952.
Read on Wikipedia · Image Hannes Röst, Public domain
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