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AP EAMCET202123 Aug 2021Evening ShiftChemistryGeneral Organic ChemistryActual

The correct order for increasing reactivity towards S_N 1 substitution for the following compounds is array ll 1. CH ₃ CH ₂ Br & 2. CH ₂= CH - CH ( Br ) CH ₃ 3. CH ₂= CHBr & 4. CH ₃- CH ( Br ) CH ₃ array

Options

  1. A1 < 4 < 3 < 2
  2. B4 < 1 < 2 < 3
  3. C3 < 1 < 2 < 4
  4. D3 < 1 < 4 < 2

Correct answer

D. 3 < 1 < 4 < 2

Step-by-step solution

S _ N l reaction is a two step reaction in which greater the stability of carbocation, greater will be its formation from alkyl halide and faster will be the rate of reaction. As, the stability of carbocations formed is in the order. (2)>(4)>(1)>(3) The order of reactivity towards S _ N 1 reaction will be (3) < (1) < (4) < (2) .

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