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NEET2006ChemistryHaloalkanes and HaloarenesActual

The correct increasing order of the reactivity of halides for S _ N 1 reaction is

Options

  1. Aaligned & CH ₃- CH ₂-X < ( CH ₃ )₂ CH -X < & CH ₂= CH - CH ₂-X < PhCH ₂-X aligned
  2. Baligned & ( CH ₃ )₂ CH -X < CH ₃- CH ₂-X < & CH ₂= CH - CH ₂-X < PhCH ₂-X aligned
  3. Caligned & PhCH ₂-X < ( CH ₃ )₂ CH -X < CH ₃- CH ₂-X < & CH ₂= CH - CH ₂-X aligned
  4. Daligned & CH ₂= CH - CH ₂-X < Ph - CH ₂-X < & ( CH ₃ )₂ CH -X < CH ₃- CH ₂-X aligned

Correct answer

A. aligned & CH ₃- CH ₂-X < ( CH ₃ )₂ CH -X < & CH ₂= CH - CH ₂-X < PhCH ₂-X aligned

Step-by-step solution

Reactivity of halides towards S _ N 1 mechanism is benzyl > allyl >3^ >2^ >1^ .

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