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what are electron donating/withdrawing groups wt activated positions
| Substituents | Activated positions |
|---|---|---|
Electron withdrawing | –NO2 –COOH –COR | 3 and / or 5 |
Electron donating | –R –OH –NH2 | 2, 4 and / or 6 |
Halogenation of benzene
Electrophilic sub
cl2/br2
AlCl3 catalyst
room temp
Alkyl benzene to 2/4halobenzene
X2
anhydrous alcl3