This document discusses organosulfur compounds, including their preparation, reactions, and uses. Key points: - Organosulfur compounds contain sulfur bonded to carbon atoms. Common examples include cysteine and methionine amino acids. - Thiols and thioethers are important organosulfur compounds that can be prepared from alkyl halides, alcohols, or sodium salts of thiols. - Thioethers undergo substitution and oxidation reactions. Dimethyl sulfide can be oxidized to dimethyl sulfoxide and further to dimethyl sulfone. - Sulfur ylides derived from sulfonium and sulfoxonium salts react with carbon