A-Level CAIE Chemistry A2 30.1.2—Mechanism: electrophilic substitution in arenes Question Bank

• Describe the mechanism of electrophilic substitution in arenes:

- (a) as exemplified by the formation of nitrobenzene and bromobenzene

- (b) with regards to the effect of delocalisation (aromatic stabilisation) of electrons in arenes to explain the predomination of substitution over addition