Sulphinyl, sulphonyl, and sulphonium groups as leaving groups in aromatic nucleophilic substitutions
Abstract
The kinetics of hydrolysis of mononitrophenyl sulphoxides, sulphones, and sulphonium methylsulphate by sodium hydroxide have been measured in 25% aqueous dioxan. The mobility order of the leaving groups ([graphic omitted]Me2 SO ≃ SO2for p- nitro -derivatives, and SO > SO2for o-nitro-derivatives) are discussed in terms of electronic and steric effects.