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Haloalkanes and Haloarenes — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryHaloalkanes and Haloarenes1 Mark
MCQ
Under identical conditions, the SN​1 reaction will occur most efficiently with:
  • A
    tert-butyl chloride
  • B
    1-chlorobutane
  • C
    2-methyl-1-chloropropane
  • D
    2-chlorobutane
✓

Answer

  1. tert-butyl chloride

Explanation:

SN​1 reaction is most effective in 3° carbon.The order goes as

Tert > secondary > primary > methyl

(CH3​)3​−C−Cl tert−butyl chloride(3°)

CH3​CH2​CH2​CH2​Cl​ 1−chlorobutane(1°)

Cl−CH2​−CH(CH3​)−CH3

CH3CH2​CH(Cl)CH3 2−chlorobutane(2°)

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