IUPAC Nomenclature of Organic Compounds Quiz
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Questions and Answers

How does the –NO2 group stabilize the negative charge in ortho- and para-positions with respect to the halogen substituent?

  • By withdrawing electron density through resonance (correct)
  • By exerting an inductive effect
  • By increasing electrophilicity
  • By donating electrons through resonance

    • What effect does a nitro group at meta-position have on the reactivity in electrophilic substitution reactions?

  • Promotes ortho- and para-substitution
  • No effect on reactivity
  • Increases reactivity
  • Decreases reactivity (correct)

    • Why does halobenzene show an o, p-directing influence in electrophilic substitution reactions?

  • Resonance structures with increased electron density at ortho- and para-positions (correct)
  • Due to hyperconjugation effects
  • Because of donating electrons through resonance
  • Withdrawal of electron density by inductive effect

    • What role does the halogen atom play in the electrophilic substitution reactions of haloarenes?

    <p>Deactivating the ring</p> Signup and view all the answers

    How do electrophilic substitution reactions in haloarenes compare to those in benzene?

    <p>Occur at higher temperatures</p> Signup and view all the answers

    Why does the presence of a nitro group at meta-position not stabilize the negative charge?

    <p>Lack of resonance structures with negative charge on carbon bearing NO2 group</p> Signup and view all the answers

    Which position do further substitutions occur at with respect to a halogen atom due to o, p-directing influence?

    <p>Ortho- and para-positions</p> Signup and view all the answers

    What effect does the halogen atom have on the electron density in the benzene ring?

    <p>-I effect, withdrawing electron density</p> Signup and view all the answers

    Why do electrophilic substitution reactions in haloarenes require more drastic conditions than those in benzene?

    <p>-I effect and -M effect of halogen atom deactivate ring</p> Signup and view all the answers

    Which group promotes ortho- and para-substitution in electrophilic aromatic substitution reactions?

    <p>–Cl group</p> Signup and view all the answers

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