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# Engineering

How to know reactions are Markovnikov and anti-Markovnikov rule?

Answers (1)
L Lovekush Kumar Saini

Markownikoff’s addition:—

  • When an unsymmetrical reagent adds to an unsymmetrical alkene, the negative part of reagent adds to that carbon of carbon-carbon double bond which carries a lesser number of hydrogen atoms.
  • In this reaction,carbonium ion is formed as an intermediate.

Anti-Markownikoff’s addition:—

  • When an unsymmetrical reagent (HBr) adds to an unsymmetrical alkene in the presence of peroxide, a negative part of reagent adds to that carbon of carbon-carbon double bond which carries more number of hydrogen atoms.
  • In this reaction, free radicals are formed as an intermediate.

           

           

 

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