Description:3 Alkenes and Alkynes: The Nature of Organic Reactions 78. 4 Reactions of Alkenes and Alkynes 112. 5 Aromatic Compounds 155. 6 Stereochemistry at Tetrahedral Centers 189. 7 Organohalides: Nucleophilic Substitutions and Eliminations 222. 8 Alcohols, Phenols, Ethers, and Their Sulfur Analogs