Organic Synthesis and Aromatic Substitution Quiz
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Questions and Answers

In the synthesis of p-bromonitrobenzene from benzene, which reagent is used to introduce the bromine substituent?

  • Fe, Br2 135-145
  • Br + H2SO4 HNO3
  • O2N Br
  • Br2 Fe Br HNO3 H2SO4 (correct)
  • When two similar o,p-directing groups are present, why is substitution at the ortho position hindered?

  • + Cl C
  • 80% yield (correct)
  • AlCl3 CH3
  • Substitution is not hindered
  • In the case of conflicting directing effects of two groups, which effect generally predominates if one group is much more strongly activating than the other?

  • The less powerful activating group
  • The more powerful activating group (correct)
  • Both groups have equal activating strength
  • Neither group has an activating effect
  • Why is the benzylic hydroxy group unusually reactive in many situations?

    <p>Resonance structures of benzyl cation</p> Signup and view all the answers

    What is the reason for the greater reactivities of benzylic halides compared to non-benzylic alkyl halides?

    <p>Stabilities of the carbocation intermediates formed</p> Signup and view all the answers

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