Behaviour of compounds containing sulphur-oxygen bond in disulphuric acid

Abstract

Cryoscopic and conductometric studies of a variety of compounds containing S-O bond, in disulphuric acid have shown that dimethyl sulphoxide, and alkyl and aryl sulphones and disulphides behave as strong bases, while diphenyl sulphoxide is sulphonated. Introduction of electron withdrawing groups in the benzene ring has no effect on the basicity of the sulphoxides whereas nitro group decreases the basicity of sulphones. A comparative study of the protonation of these solutes in sulphuric and disulphuric acids reveals that the latter is stronger.