The Halogenation of Toluene with Sulphuryl Chloride and Dichlorine in the Presence of Transition Metal Complexes

Article abstract of DOI:10.1016/0022-328X(86)80417-X

A detailed study has been made of the halogenation of toluene in the presence of a range of transition metal complexes.Both side-chain and ring chlorination are observed, the favoured route depending on the metal complex.Side-chain halogenation, in the presence of and (M= Pd, Pt), has been shown to proceed by a free radical chain reaction in which the metal complex acts solely as an initiator.In the presence of, (M= Mn, Re), , and , ring chlorinated products are formed by a Friedel-Crafts mechanism.