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Haloalkanes and Haloarenes — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryHaloalkanes and Haloarenes1 Mark
MCQ
The most reactive towards SN​1 is:
  • A
    PhCH2​Cl
  • B
    PhCl
  • C
    PhCH(Cl)CH3​
  • D
    p−NO2​PhCH2​Cl
✓

Answer

  1. PhCH(Cl)CH3

Explanation:

The rate of SN​1 reaction depends upon the stability of the carbocation formed.

The compound given in option C forms the most stable carbocation after removal of Cl. This carbocation is most stable due to resonance, hyperconjugation and +I effect of methyl group so it will react easily.

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