The decreasing order of reactivity of the following compounds towards nucleophilic substitution ( S N 2 ) is:

The decreasing order of reactivity of the following compounds towards nucleophilic substitution (SN2) is:

  1. (II) > (III) > (I) > (IV)
  2. (II) > (III) > (IV) > (I)
  3. (III) > (II) > (IV) > (I)
  4. (IV) > (II) > (III) > (I)

Solution

Rate of SN2 reation α Electrophilicity of alkyl carbon α 1Steric crowding on R-X

SN2 reaction depend upon -I, -M, effect.-I,-M group increases the rate of SN2 reaction.

Asked in: JEE Main 2020 (03 Sep Shift 2)

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