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QCM 20 maraichers 2019


Go to solution Solved by Chpoum,

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  • Solution
Posted

Salut dans la réaction A tu fixes Cl sur ton benzène => groupement +M donc il sera ortho para directeur => 2 (ortho) ou 4 (para) pas de 3 

dans la réaction B tu fixes CH3 donc pareil groupement +I donc ortho para directeur donc 2 ou 4 

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