Question

Arrange the following compounds in their decreasing order of reactivity towards electrophilic substitutions. 1, 3 -Dinitrobenzene, Phenol, 2-Nitrophenol, 4-Bromophenol.

Answer 1

Phenol > 4-bromo phenol > 2-nitro phenol > 1,3 - dinitrobenzene.

Answer 2

Hey dear,

● Answer -
Decreasing order of reactivity towards electrophilic substitution reactions is -
phenol > 4-bromophenol > 2-nitrophenol > 1,3-dinitrobenzene

● Explanation -
- Reactivity of a compound towards electrophilic substitution is determined by its functional groups.
- Electron donating groups activate the ring. e.g. CH3, OH, etc.
- Electron withdrawing groups deactivate the ring. e.g. NO2, Cl, etc.
- Hence, decreasing order of reactivity towards electrophilic substitution reactions is -
phenol > 4-bromophenol > 2-nitrophenol > 1,3-dinitrobenzene

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