The article contains sections titled: 1. Sulfones 1.1. Physical and Chemical Properties 1.2. Synthesis 1.2.1. Oxidation of Thioethers (Sulfides) 1.2.2. Alkylation of Sulfinic Acid Derivatives 1.2.3. Addition of Sulfinic Acid Derivatives to Multiple Bonds 1.2.4. Rearrangement of Sulfinates 1.2.5. Sulfones from Sulfonyl Carbanions 1.2.6. Addition of Sulfur Dioxide 1.3. Reactions 1.4. Industrial Uses 2. Sulfoxides 2.1. Physical and Chemical Properties 2.2. Synthesis 2.2.1. Oxidation of Sulfides 2.2.2. Reaction of Sulfur Dioxide with Aromatics 2.2.3. Sulfoxides from Sulfinates 2.2.4. α,β-Unsaturated Sulfoxides 2.2.5. Optically Active Sulfoxides 2.3. Reactions 2.3.1. Reactions of α-Sulfinyl Carbanions 2.3.2. Reactions with Grignard Reagents 2.3.3. Pummerer Rearrangement 2.3.4. Oxidation and Reduction 2.4. Uses 2.5. Dimethyl Sulfoxide 2.5.1. Production 2.5.2. Uses 2.5.3. Reactions 3. Toxicology 3.1. Sulfones 3.2. Dimethyl Sulfoxide 4. Acknowledgement