GENERAL

• WHY DO ARENES MOSTLY UNDERGO ELECTROPHILIC SUBSTITUTION?

  unsaturated but do not react like alkenes
• WHY IS ELECTROPHILIC SUBSTITUTION MORE COMMON THAN ADDITION REACTIONS?

  • no delocalisation energy required to destroy aromatic compound
  • high electron density of delocalised system of aromatic ring attracts electrophile (also vice versa)
• TWO TYPES OF ELECTROPHILIC SUBSTITUTION OF ARENES?

  nitration and friedel-crafts acylation reactions