Question

What is the term used for partially deactivated palletized charcoal?

Answer 1

Lindlar's catalyst

• Partially deactivated palletized charcoal is known as Lindlar's catalyst.
• Alkenes are formed when alkynes are partially reduced with a determined amount of dihydrogen in the presence of palletized charcoal, which has been partially deactivated with poisons such as quinoline or sulfur compounds.
• Alkenes obtained by this catalyst are having cis geometry.

Conversion of alkyne to an alkene

• In the given reaction, the cis alkene is formed.
• The reaction is as follows:-

So, the term used for partially deactivated palletized charcoal is Lindlar's catalyst.