What you’ll learn2 learning objectivesChoose one objective for a focused lesson, or study the complete topic.31.1.1Preparation of halogenoarenes• Recall the reactions by which halogenoarenes can be produced: substitution of an arene with C l₂ or Br₂ with a catalyst, Al Cl₃ or Al Br₃ to form a halogenoarene, exemplified by benzene to form chlorobenzene and methylbenzene to form 2-chloromethylbenzene and 4-chloromethylbenzeneSyllabus objective31.1.2Difference in reactivity• Explain the difference in reactivity between a halogenoalkane and a halogenoarene as exemplified by chloroethane and chlorobenzeneSyllabus objective