Using benzene as solvent ,the reactions of several aromatic hydrocarbons with N-bromosuccinimide at visible light and nitrogen atmosphere were examined. The reaction processes were traced by GC and the causes of different resultants were explored. The results show that methyl aromatic hydrocarbons merely produced mono-bromide and that hydrogenated aromatic hydrocarbons predominantly afforded dehydrogenated products ,whereas all of anthracene turned into 9,10-dibromoanthracene.

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