Chapter 13: Ethers and Epoxides; Thiols and Sulfides

Students learn the nomenclature conventions for naming ethers using both common and IUPAC systems, as well as the structural features that influence their chemical properties. The chapter explores the preparation of ethers through methods such as the Williamson ether synthesis, which involves nucleophilic displacement of a leaving group by an alkoxide ion, and understanding the factors that determine reaction feasibility and regioselectivity. Epoxides, three-membered rings containing an oxygen atom, receive detailed attention regarding their synthesis from alkenes using peracids and their distinctive reactivity patterns. The text explains how the ring strain in epoxides makes them highly susceptible to nucleophilic attack and ring opening reactions, with discussion of regiochemistry and stereochemistry outcomes under both acidic and basic conditions. The chapter then shifts focus to thiols and sulfides, which are the sulfur analogs of alcohols and ethers respectively. Students learn about thiol oxidation reactions, sulfide preparation, and the unique properties that arise from sulfur's greater size and lower electronegativity compared to oxygen. Throughout the chapter, reaction mechanisms are illustrated with detailed electron-pushing diagrams, and practical applications of these functional groups in organic synthesis are demonstrated. By synthesizing knowledge across all four functional group families, students develop a comprehensive understanding of heteroatom chemistry and gain proficiency in predicting reaction outcomes and designing synthetic routes.