Chapter 23: Aryl Halides

Summary

In general, aryl halides (C₆H₅-X or Ar-Xwhere X = F, Cl, Br and I) are much less reactive than simple alkyl halides since they do not usually undergo simple nucleophilic substitution (except under very specific conditions).

Important reaction of aryl halides are:

• electrophilic aromatic substitution (review),deactivated and directing ortho, para.
• preparation and use of aryl Grignard reagents

• Nomenclature
• Physical Properties
• Structure
• Reactivity

Halogenation of arenes
Via Aryl Diazonium salts

Reactions of Aryl Halides

• Electrophilic Aromatic Substitution
• Overview of Nucleophilic Aromatic Substitution:
• Addition-Elimination mechanism
• Elimination-Addition mechanism
• Aryl Grignards

• Structure
• Reactivity
• Addition reactions
• Diels-Alder reactions

• Sample problems

© Dr. Ian Hunt, Department of Chemistry