Ch17 Reactions of Aromatic Compounds (landscape)docx Page4 Bromide ion from the FeBr 4can act as a weak base to remove the proton, thus generating the aromatic product, HBr, and regenerating the catalyst (FeBr 3) The formation of the sigma complex is an endothermic and energetically unfavorable process it is therefore theA new process for the generation of paraxylene (pxylene) through benzene alkylation with CH 3 Br has been proposed for the first time CH 3 Br is prepared by the catalytic bromination of methane (the main component of natural gas), and benzene can be prepared from methane dehydroaromatization Over the optimized P 2 O 5 –ZnO/HZSM5 catalyst, benzene conversion is 436% and pxyleneBromination of the substituted toluenes in the presence of ammonium cerium(IV) sulfate and inmore The mono and polybromination of benzene, halogenobenzenes, toluene, pxylene, anisole, biphenyl, benzotrifluoride, benzoic acid, pnitro and pcarboxytoluene, pmethoxybenzonitrile, tetralin, and naphthal
