Bromination of Halogenobenzenes in the Gaseous Phase; Influence of Temperature and Catalysts on the Substitution Type

IN continuation of preliminary experiments¹, we have studied the monobromination of bromobenzene, chlorobenzene and fluorobenzene in the gaseous phase at several temperatures between 380° and 500° C., in the presence of artificial graphite as a contact substance, under well-defined conditions of temperature and rate of gas flow. A few typical results are given in Table 1.