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SN1 and SN2 Reaction and Mechanism of SN1 and SN2 CBSE class 12 chemistry

What is SN1 AND SN2 reaction. Machanism of SN1 AND SN2 Reaction. CBSE class 12

 SN1 Reaction

Means of SN1 reaction is uni molecular nucleophilic substitution reaction. It means that molecularity of reaction is 1. As we know that the molecularity of reaction depending up on the number of reactants molecule which are participating in rate determining step. or slow step.

The terminal ke liye uplift substitution interior Devta Saturday San off any atom or group take place via nucleophile.

Reaction Mechanism of SN1 Reaction

  • Reaction mechanism involves in two steps. 
  • First step is rate determine step in which the formation of carbo-cation take place after removal of leaving group halogen atom.
  • In second step attacking of nucleophilic place on carbocation and result of which product formation take place.
  • Just ability of product depending up on the stability of carbon that is 3>2>1.
  • The order of reactivity of Haloalkane will be I>Br>Cl>F.

Stereo Chemistry of SN1 Reaction

The product which will form after SN1 reaction having either retention or inversion in configuration.

  SN2 Reaction 

Means of SN2 reaction is biomolecular nucleophilic substitution reaction. It means that molecularity reaction is 2. As you know that the molecularity of reaction depending up on the number of reactant molecules which are participating in rate determining step or slow step.

The terminal ke liye file substitution in the substitution of any atom are group take place by a nucleophile

Reaction Mechanism of SN2 Reaction

  • Reaction mechanism involves in single step.
  • Product formation take place by a transition state in which old bond breaking and new bond forming both take place simultaneously.
  • Stability of product depending up on the stability of carbocation 1>2>3>.
  • Order reactivity haloalkane will be I>Br>Cl>F. 

Stereo Chemistry of SN2 Reaction

 In the stereo chemistry of SN2 reaction. it has been concluded that's newly produce product formed always has inversion in configuration in the owner of the scientist walden sach inversion is known as walden inversion.  



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