thumb|S-Ethylisothiouronium diethylphosphate|S-Ethylisothiouronium diethylphosphate: an example of an isothiuronium compound
thumb|S-Ethylisothiouronium diethylphosphate|S-Ethylisothiouronium diethylphosphate: an example of an isothiuronium compound
In organic chemistry, isothiouronium is a functional group with the formula [RSC(NH2)2]+ (R = alkyl, aryl) and is the acid salt of isothiourea. The H centres can also be replaced by alkyl and aryl. Structurally, these cations resemble guanidinium cations. The CN2S core is planar and the C–N bonds are short.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).