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Haloalkanes and Haloarenes — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryHaloalkanes and Haloarenes1 Mark
MCQ
SN​1 reaction is favoured by:
  • A
    Non-polar solvents
  • B
    Bulky group on the carbon atom attached to the halogen atom.
  • C
    Small groups on the carbon atom attached to halogen atom.
  • D
    All the above
✓

Answer

  1. Bulky group on the carbon atom attached to the halogen atom.

Explanation:

SN1 mechanism proceeds through carbocation formation and as stability of carbocation increases, it favours SN1 mechanism.

And as we add bulky group to carbon attached with halogen, carbocation formed will become more stable due to +I effect of bulky alkyl group so it favours SN1 mechanism.

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