Question

1) Which of the following is an intermediate in the bromination of toluene? p) Ha BrH 2 2) Under what reaction conditions would the electrophilic chlorination of aromatic compounds usually occur? A) Cl2, AlCl3 B) C12, CCl4 C) Cl2, H20 D) NaCl, H20 E) NaCI, CH3OH 3) 3) Which of the following is the strongest activating group in electrophilic aromatic substitution reactions? A) -CO2CH3 B)-NO2 C) -OCH3 D) -CH2CH3 E) -N(CH3)2 4) _ 4) In electrophilic aromatic substitution reactions the nitro group is: A) an o,p-director since it stabilizes the ortho, para sigma complex more than the meta. B) a m-director since it destabilizes the meta sigma complex less than the ortho, para. C) an o,p-director since it stabilizes the ortho, para sigma complex less than the meta. D) a m-director since it destabilizes the meta sigma complex more than the ortho, para. E) none of the above. 5) In electrophilic aromatic substitution reactions a bromine substituent: A) is an activator and a m-director. B) is an activator and an o,p-director. C) is a deactivator and a m-director. D) is a deactivator and an o,p-director. E) none of the above 6) 6) In electrophilic aromatic substitution reactions, an acetamido (-NHCOCH3) substituent on the aromatic ring is: A) a deactivator and a m-director. B) an activator and an op-director. C) an activator and a m-director. D) a deactivator and an op-director. E) none of the above.

Answer 1

1.D

2. A (Cl2, AlCl3)

3.E N(CH3)2

4.B

5.D is a deactivator and an o,p-director

6.B an activator and an O,P - director.