Thioacyl chloride
In organic chemistry, thioacyl chloride is a functional group of the type RCCl, where R is an organic substituent. Thioacyl chlorides are analogous to acid chlorides, but much rarer and less robust. The best studied is thiobenzoyl chloride, a purple oil first prepared by chlorination of dithiobenzoic acid with a combination of chlorine and thionyl chloride. A more modern preparation employs phosgene as the chlorinating agent, this also generates carbonyl sulfide as a by-product.
The compounds are more stable with electron-releasing substituents.
