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Question

What is the term used for partially deactivated palletized charcoal?


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Solution

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.


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