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Get your questions answered here: http://kuadro.com.br/videoaula/quimic... Watch other chemistry video lessons: http://kuadro.com.br/quimica In substitution reactions, does the benzene ring have preference? In this video lesson, we show that the conditions of the system can determine which hydrogen atom will be replaced in the case of a branched aromatic organic molecule. The replaced hydrogen will not always come from the aromatic ring. Study with Kuadro and be better prepared for the Chemistry tests of ENEM and other entrance exams.