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NEET2022ChemistryHaloalkanes and HaloarenesActual

Predict the order of reactivity of the following four isomers towards S _ N 2 reaction. (I) CH ₃ CH ₂ CH ₂ CH ₂ Cl (II) CH ₃ CH ₂ CH ( Cl ) CH ₃ (III) ( CH ₃ )₂ CHCH ₂ Cl (IV) ( CH ₃ )₃ CCl

Options

  1. A(IV) > (III) > (II) > (I)
  2. B(I) > (II) > (III) > (IV)
  3. C(I) > (III) > (II) > (IV)
  4. D(IV) > (II) > (III) > (I)

Correct answer

C. (I) > (III) > (II) > (IV)

Step-by-step solution

The rate of reaction decreases with increase in stearu crowding around the substrate centre. Rate of S _ N ^2 1 Stearic crowding Rate of reactivity order is : I > III > II > IV

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