thumb|right|150px|The general structure of an iminium cation
thumb|right|150px|The general structure of an iminium cation
In organic chemistry, an iminium cation is a polyatomic ion with the general structure {{chem2|1=[R^{1}R^{2}C\dNR^{3}R^{4}]+}}. They are common in synthetic chemistry and biology.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).