Which reagent is used for the selective hydrogenation of alkynes to alkenes?

Which reagent is used for the selective hydrogenation of alkynes to alkenes?

Step 1: Understand that alkynes are a type of hydrocarbon with a triple bond between carbon atoms.
Step 2: Know that hydrogenation is a chemical reaction where hydrogen is added to a compound.
Step 3: Realize that we want to convert alkynes (with triple bonds) to alkenes (with double bonds) using hydrogen.
Step 4: Identify that a catalyst is needed to speed up the hydrogenation process without being consumed.
Step 5: Learn that Pd/BaSO4 (palladium on barium sulfate) is a specific catalyst used for this reaction.
Step 6: Conclude that using Pd/BaSO4 allows for the selective hydrogenation of alkynes to form alkenes without fully saturating them to alkanes.

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