Sulfonium compounds are a class of chemical compounds that contain a positively charged sulfur atom bonded to three organic groups. They are often represented by the general formula R₃S⁺, where R represents the organic groups. These compounds are known for their role in various chemical reactions, including as intermediates in organic synthesis. Common examples of sulfonium compounds include trimethylsulfonium chloride and dimethylsulfonium methylide. They are used in the production of sulfonium salts, which can serve as reagents in the formation of carbon-carbon bonds. Their unique properties make them valuable in both industrial and laboratory settings.