Electrophilic Substitution of Benzene (OCR A-Level Chemistry A): Flashcards

Electrophilic substitution

Conc. $H_2SO_4$, 50°C

Nitronium ion ($NO_2^+$)

To generate electrophile ($Br^+$ or $Cl^+$)

$FeBr_3$ or $AlBr_3$

Haloalkane

Acyl chloride

Aromatic ketone

Preserves aromatic stability

Alkene decolourises; benzene doesn't (needs catalyst)