Aromatic Compounds and Arenes
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Questions and Answers

What is the hybrid structure that represents the actual structure of benzene?

  • Resonance structure (correct)
  • Hückel's annulene structure
  • Molecular orbital structure
  • Kekulé structure

    • What is the major limitation of the Kekulé structure of benzene?

  • It does not account for the planarity of the molecule
  • It does not account for the unusual chemical reactivity of benzene (correct)
  • It does not account for the molecular orbitals of benzene
  • It does not account for the resonance of benzene

    • What is the bond order of the C-C bonds in benzene?

  • 2
  • 3
  • 1
  • 1.5 (correct)

    • What is the molecular formula of benzene?

    <p>C6H6</p> Signup and view all the answers

    What is the hybridization of the carbon atoms in benzene?

    <p>sp2</p> Signup and view all the answers

    Who proposed the Kekulé structure of benzene?

    <p>August Kekulé</p> Signup and view all the answers

    What is the primary product of the nitration of toluene?

    <p>A mixture of products resulting from substitution at the ortho and para positions</p> Signup and view all the answers

    What is the role of Lewis acid catalysts in the Friedel-Crafts alkylation?

    <p>To catalyze the reaction</p> Signup and view all the answers

    What is the electrophile in the Friedel-Crafts alkylation?

    <p>The alkyl cation</p> Signup and view all the answers

    What is the suffix used to name acyl groups systematically?

    <p>-oyl</p> Signup and view all the answers

    Who first studied the reactions of carbocations with aromatic compounds?

    <p>Charles Friedel and James Crafts</p> Signup and view all the answers

    What is the type of reaction that occurs in the Friedel-Crafts alkylation?

    <p>Electrophilic aromatic substitution</p> Signup and view all the answers

    What is the length of all carbon-carbon bonds in benzene?

    <p>1.397 Å</p> Signup and view all the answers

    What is the primary reason for benzene's aromaticity?

    <p>The delocalization of π electrons within its hexagonal ring</p> Signup and view all the answers

    What happens when bromine is added to benzene?

    <p>The bromine color remains</p> Signup and view all the answers

    What is the effect of long-term exposure to benzene on the body?

    <p>A decrease in the number of red blood cells and an increase in the number of malfunctioning white blood cells</p> Signup and view all the answers

    What is the bond angle in benzene?

    <p>120°</p> Signup and view all the answers

    What type of reaction occurs when a catalyst is added to the mixture of bromine and benzene?

    <p>Substitution reaction</p> Signup and view all the answers

    What is the product of the reaction between ethylbenzene and chlorine in the presence of light?

    <p>Alphachloroethylbenzene</p> Signup and view all the answers

    What reagents are used in the Friedel-Crafts acylation reaction to produce ethyl phenyl ketone?

    <p>AlCl3 and propanoyl chloride</p> Signup and view all the answers

    What is the difference between aromatic and antiaromatic compounds?

    <p>Aromatic compounds have 2, 6, or 10 π electrons, while antiaromatic compounds have 4 or 8 π electrons</p> Signup and view all the answers

    What is the source of phenylalanine for humans and animals?

    <p>They can obtain it from the diet</p> Signup and view all the answers

    What is a by-product of the reaction between bromine and benzene?

    <p>HBr gas</p> Signup and view all the answers

    Why does benzene show resonance?

    <p>Due to the presence of three conjugated double bonds</p> Signup and view all the answers

    What type of compounds can also be aromatic, aside from benzene?

    <p>Heterocyclic compounds</p> Signup and view all the answers

    What is the main reason why alkylbenzenes undergo free-radical halogenation more easily than alkanes?

    <p>Formation of a resonance-stabilized benzylic radical</p> Signup and view all the answers

    What is the product of the Clemmensen reduction of ethyl phenyl ketone?

    <p>Ethylbenzene</p> Signup and view all the answers

    What is the role of sodium hydroxide in the chemistry of phenols?

    <p>It deprotonates phenols to form phenoxide ions</p> Signup and view all the answers

    What is pyridine?

    <p>An aromatic nitrogen analogue of benzene</p> Signup and view all the answers

    What is the characteristic of phenols that makes them more acidic than water?

    <p>Their ability to form phenoxide ions easily</p> Signup and view all the answers

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