IUPAC Nomenclature of Ketones and Aldehydes

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Questions and Answers

What is the systematic way to derive the IUPAC name of a ketone?

  • Replace the final -e in the alkane name with -ol.
  • Replace the final -e in the alkane name with -yl.
  • Replace the final -e in the alkane name with -one. (correct)
  • Replace the final -e in the alkane name with -al.

What is the product formed by the reaction of a ketone or aldehyde with a primary amine?

  • A carboxylic acid.
  • An imine. (correct)
  • A hydrocarbon.
  • An ether.

What is the primary reason for the higher boiling points of ketones and aldehydes?

  • The increased surface tension of ketones and aldehydes.
  • The presence of hydrogen bonding between the molecules.
  • The larger molecular weights of ketones and aldehydes.
  • The polarization of the carbonyl group, resulting in dipole-dipole attractions. (correct)

What type of bonding can ketones and aldehydes participate in with other compounds?

<p>Hydrogen bonding with compounds having O-H or N-H bonds. (A)</p> Signup and view all the answers

What is the combination of a carbonyl group and a hydroxyl on the same carbon atom called?

<p>A carboxyl group. (D)</p> Signup and view all the answers

What is a characteristic property of compounds containing the carboxyl group?

<p>They are highly acidic. (D)</p> Signup and view all the answers

What is the result of a carboxylic acid donating a proton by heterolytic cleavage of the acidic bond?

<p>A carboxylate ion and a proton (D)</p> Signup and view all the answers

What type of acid has an alkyl group bonded to the carboxyl group?

<p>Aliphatic acid (B)</p> Signup and view all the answers

Why do carboxylic acids boil at higher temperatures than alcohols, ketones, or aldehydes of similar molecular weights?

<p>Due to the formation of a stable, hydrogen-bonded dimer (A)</p> Signup and view all the answers

What is formed when a carboxylic acid dissociates in water?

<p>A proton and a carboxylate ion (B)</p> Signup and view all the answers

What is the combination of a carboxylate ion and a cation?

<p>A salt of a carboxylic acid (D)</p> Signup and view all the answers

What properties do carboxylic acid salts have compared to the acids?

<p>Enhanced solubility in water and less odor (C)</p> Signup and view all the answers

What is the shape of the ammonia molecule according to its hybridization?

<p>Tetrahedral (D)</p> Signup and view all the answers

What is the characteristic of a quaternary ammonium salt?

<p>A nitrogen atom with a positive charge (D)</p> Signup and view all the answers

What type of bonds are present in primary and secondary amines?

<p>C-H and N-H bonds (A)</p> Signup and view all the answers

Why are amines strongly polar?

<p>Due to the large dipole moment of the lone pair of electrons (D)</p> Signup and view all the answers

What is a characteristic of an amine as a nucleophile?

<p>It forms a bond with an electrophile using its lone pair of electrons (A)</p> Signup and view all the answers

Why can tertiary amines not engage in hydrogen bonding?

<p>Because they have no N-H bonds (B)</p> Signup and view all the answers

What is the major difference between carboxylic acid salts and carboxylic acids?

<p>Their ability to convert back to carboxylic acids upon addition of mineral acid (A)</p> Signup and view all the answers

What is the most commercially important aliphatic acid?

<p>Acetic acid (B)</p> Signup and view all the answers

What is the product formed when an acid reacts with an amine?

<p>An ammonium carboxylate salt (D)</p> Signup and view all the answers

What is the characteristic feature of the cyano group (-C  N) in nitriles?

<p>A linear R-C  N bond angle (D)</p> Signup and view all the answers

Why are nitriles classified as acid derivatives?

<p>Because they hydrolyze to give carboxylic acids (A)</p> Signup and view all the answers

What is the result of heating an ammonium carboxylate salt formed from an acid and an amine?

<p>Formation of an amide (A)</p> Signup and view all the answers

What is the reason for the reduced basicity of arylamines compared to simple aliphatic amines?

<p>Resonance delocalization of the nonbonding electrons (D)</p> Signup and view all the answers

What is the primary advantage of using amine salts instead of the parent amines in pharmaceutical applications?

<p>Improved stability against oxidation (B)</p> Signup and view all the answers

Why are amines often converted to their salts for storage?

<p>To prevent oxidation in contact with air (C)</p> Signup and view all the answers

What is the term for the process by which amines react with a proton to form an ammonium ion?

<p>Protonation (D)</p> Signup and view all the answers

What is a common side reaction that can occur during amine syntheses?

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

What is a characteristic of amine salts that makes them more suitable for pharmaceutical applications compared to parent amines?

<p>They are more soluble in water (D)</p> Signup and view all the answers

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