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thumb|Structure of (CH3)3S+. The C-S-C angles are 102° and C-S bond distance is 177 picometers.
thumb|Structure of (CH3)3S+. The C-S-C angles are 102° and C-S bond distance is 177 picometers.
In organic chemistry, a sulfonium ion, also known as sulphonium ion or sulfanium ion, is a positively charged ion (a "cation") featuring three organic substituents attached to sulfur. These organosulfur compounds have the formula . Together with a negatively charged counterion, they give sulfonium salts. They are typically colorless solids that are soluble in polar organic solvent.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).