aliphatic hydrocarbons and the side chains of aromatichydrocarbons were chlorinated in subcritical carbontetrachloride. Chlorination of aromatic compounds including 1,4-disubstituted benzenes was investigated. Ketones and sulfones were stable under the employed conditions. Sulfoxides were converted into sulfides in a low to modest yields. The coupling adducts between olefins and carbontetrachloride were