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w_aroma_2_all (2) - Exam Name SHORT ANSWER Write the word...

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Exam Name___________________________________ SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 1) Provide the major resonance structures of the intermediate sigma complex in the reaction of benzene with the generic electrophile E + . 1) ESSAY. Write your answer in the space provided or on a separate sheet of paper. 2) In the bromination of benzene using Br 2 and FeBr 3 , is the intermediate carbocation aromatic? Explain. 3) Which step in an electrophilic aromatic substitution reaction is typically rate determining, formation of the sigma complex or loss of H + by the sigma complex to form the product? Explain. 4) Provide a detailed, stepwise mechanism for the reaction of benzene with Br 2 and FeBr 3 . Make sure to include the activating reaction between Br 2 and FeBr 3 in your mechanism. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 5) Under what reaction conditions does the electrophilic chlorination of aromatic compounds usually occur? A)NaCl, CH 3 OH B)Cl 2 , AlCl 3 C)Cl 2 , CCl 4 D)NaCl, H 2 O E)Cl 2 , H 2 O 5) 6) Which of the following species is attacked by benzene in the electrophilic nitration reaction? 6) SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 7) Name the major organic product which results when 3 - ethylbenzenesulfonic acid is heated in aqueous acid. 7) MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 8) In electrophilic aromatic substitution reactions the hydroxyl group is an o,p - director because: 8) 1
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9) In electrophilic aromatic substitution reactions the nitro group is: 9)
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  • Spring '10
  • dsfdsf
  • Benzene, major organic product, Substitution reaction, Nucleophilic Aromatic Substitution, Electrophilic aromatic substitution

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