What is the expected order of reactivity of the following compounds in electrophilic chlorination (Cl2 + FeCl3)?
  (more reactive > less reactive)
  
 A) I > II > III > IV
 B) IV > III > II > I
 C) III > I > IV > II
 D) II > III > I > IV

Dear Student,

The directing power of the group is,

(CH3)3N>NO2>CN>SO3H>CHO>COCH3>COOH

Hence the increasing order is II > III > I > IV

Option (D)

Regards.

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