Aromaticity Requirements Quiz
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Questions and Answers

Which of the following cycloalkadienes fulfills the first three requirements for aromaticity but does not obey Huckel's rule?

  • Cyclopentatriene
  • Cyclobutadiene (correct)
  • Cyclopentadiene
  • Tropilidine
  • Which cycloalkadiene tends to lose H+ to form a highly stable aromatic cyclopentadienyl anion?

  • Cyclobutadiene
  • Tropilidine
  • Cyclopentadiene (correct)
  • Cyclopentatriene
  • Which cycloalkadiene contains sp3 hybridized carbon atoms and is non-aromatic?

  • Tropilidine
  • Cyclopentadiene (correct)
  • Cyclopentatriene
  • Cyclobutadiene
  • Which cycloalkadiene forms an aromatic cycloheptatrienyl cation that obeys Huckel's rule?

    <p>Cyclopentatriene (A)</p> Signup and view all the answers

    Which cycloalkadiene has an anion that does not obey Huckel's rule and has 8 pi electrons (n=3)?

    <p>Tropilidine (A)</p> Signup and view all the answers

    What is the characteristic reaction of benzene?

    <p>Substitution of a hydrogen by an electrophile (D)</p> Signup and view all the answers

    Why does benzene not undergo addition reactions like other unsaturated hydrocarbons?

    <p>Because addition would yield a non-aromatic product (B)</p> Signup and view all the answers

    Which halogenation reagent is used for the synthesis of chlorobenzene?

    <p>Cl2 (A)</p> Signup and view all the answers

    Why are analogous reactions with I2 and F2 not synthetically useful?

    <p>I2 is too reactive and F2 is too unreactive (D)</p> Signup and view all the answers

    What is the role of FeBr3 in the halogenation of benzene?

    <p>It acts as a Lewis acid catalyst (B)</p> Signup and view all the answers

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