Organic Chemistry: Amino Groups and Heterocyclic Amines
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Questions and Answers

What is the general structure of amines?

  • R-OH
  • R-NH2 (correct)
  • R-CHO
  • R-COOH
  • What is the shape of the ammonia molecule?

  • Trigonal pyramidal (correct)
  • Tetrahedral
  • Linear
  • Trigonal planar
  • Why do tertiary amines have lower boiling points than primary and secondary amines?

  • They are more soluble in water
  • They have a larger molecular weight
  • They can form stronger hydrogen bonds
  • They cannot form hydrogen bonds with each other (correct)
  • What type of bond do amines form with hydrogen?

    <p>Hydrogen bond</p> Signup and view all the answers

    What is the main difference between amines and ammonia?

    <p>Amines have an R group, while ammonia does not</p> Signup and view all the answers

    What is the result of the reaction between a primary amine and an aldehyde or ketone?

    <p>Formation of an imine</p> Signup and view all the answers

    How are heterocyclic amines defined?

    <p>Cyclic compounds with at least one N in the ring</p> Signup and view all the answers

    What is the result of amines accepting H+ when dissolved in water?

    <p>Formation of an alkylammonium ion and hydroxide ions</p> Signup and view all the answers

    What is the purpose of decongestants, which are medically important amines?

    <p>To shrink the membranes lining the nasal passages</p> Signup and view all the answers

    How are amine salts named?

    <p>By replacing the suffix – amine with ammonium and adding the name of the anion</p> Signup and view all the answers

    What is one method of preparing amines?

    <p>Reduction of nitro compounds</p> Signup and view all the answers

    Why are amine salts often more soluble than the corresponding amines?

    <p>Because they are ionic and have a higher molecular weight</p> Signup and view all the answers

    What is the product of the reaction between an amine and an aldehyde or ketone in the presence of an acid catalyst?

    <p>An imine</p> Signup and view all the answers

    Which of the following compounds can be prepared by the reduction of an amide?

    <p>An amine</p> Signup and view all the answers

    What is the functional group found in the molecule acetaminophen (TYLENOL)?

    <p>An amide group</p> Signup and view all the answers

    Which of the following is a physiologically active amine?

    <p>Atorvastatin (Lipitor)</p> Signup and view all the answers

    What is the functional group found in the molecule p-hydroxyaniline?

    <p>A hydroxyl group and an amine group</p> Signup and view all the answers

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