Summary Sulfuryl chloride reacts with aliphatic carboxylic acids in the presence of actinic light to yield sulfonated derivatives. The lower aliphatic acids (propionic, isobutyric, butyric) yield cyclic sulfocarboxylic anhydrides in which the sulfo groups are in the beta or beta and gamma positions, while the higher aliphatic acids (valeric, hexahydrobenzoic, lauric) yield sulfonyl chlorides indicative of substitution in positions other than beta and gamma. The ...