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Questions and Answers
The compound CH3CH2NH2 is classified as a?
The compound CH3CH2NH2 is classified as a?
- Secondary amine
- Primary amine (correct)
- Quaternary amine
- Tertiary amine
Ethylmethylamine is a tertiary amine.
Ethylmethylamine is a tertiary amine.
False (B)
What is a tertiary amine?
What is a tertiary amine?
Three alkyl or aromatic groups are bonded to the nitrogen atom.
Hydrogen bonds in amines are weaker than those in alcohols.
Hydrogen bonds in amines are weaker than those in alcohols.
What type of amine has the highest boiling point?
What type of amine has the highest boiling point?
What type of amine is most soluble in water?
What type of amine is most soluble in water?
Write an equation for the ionization of propylamine in water.
Write an equation for the ionization of propylamine in water.
What two functional groups react to form an amide?
What two functional groups react to form an amide?
What reaction is the reverse of amidation to produce a carboxylic acid and an ammonium salt?
What reaction is the reverse of amidation to produce a carboxylic acid and an ammonium salt?
When ethylamine dissolves in water, a solution of ___ is produced.
When ethylamine dissolves in water, a solution of ___ is produced.
What kind of amine can form hydrogen bonds?
What kind of amine can form hydrogen bonds?
What has the higher boiling point: butylamine or diethylamine?
What has the higher boiling point: butylamine or diethylamine?
What has the higher boiling point: butane or propylamine?
What has the higher boiling point: butane or propylamine?
Amino acids that are not synthesized in the body but must be ingested with the diet are called __________ amino acids.
Amino acids that are not synthesized in the body but must be ingested with the diet are called __________ amino acids.
The structural formulas of amino acids are the same EXCEPT for the?
The structural formulas of amino acids are the same EXCEPT for the?
What functional groups are found in all α-amino acids?
What functional groups are found in all α-amino acids?
A basic amino acid has an R group that contains?
A basic amino acid has an R group that contains?
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Study Notes
Classification of Amines
- CH3CH2NH2 is a primary amine.
- Ethylmethylamine is classified as a secondary amine, not tertiary.
Types of Amines
- A tertiary amine features three alkyl or aromatic groups bonded to a nitrogen atom.
- Primary amines have the highest boiling points and are most soluble in water among amine types.
Hydrogen Bonds
- Hydrogen bonds in amines are weaker than those found in alcohols.
Ionization and Reactions
- Ionization of propylamine in water can be represented as:
CH3CH2CH2NH2 + H2O ⇌ CH3CH2CH2NH3+ + OH−. - Amides are formed when a carboxylic acid reacts with an amine.
- Acid hydrolysis is the reaction that reverses amidation, resulting in a carboxylic acid and an ammonium salt.
Chemical Behavior in Water
- Dissolving ethylamine in water results in the formation of ethylammonium hydroxide.
- Substituted, tertiary, secondary, aromatic, and primary amines are capable of forming hydrogen bonds.
Boiling Points Comparison
- Butylamine has a higher boiling point than diethylamine.
- Propylamine has a higher boiling point compared to butane.
Amino Acids
- Essential amino acids are those that cannot be synthesized by the body and must be acquired through diet.
- The structural formulas of amino acids differ primarily in their side (R) groups.
- All α-amino acids contain a carboxylate group and an ammonium group.
- Basic amino acids possess an R group that contains an amine group.
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