36 Questions
What is the type of amide shown in the structure CH3—C—NH2?
Primary (1°) amide
What type of bonding occurs between molecules of primary amides?
Hydrogen bonding
What is the functional group present in amides?
—C—N—
What is the type of amide shown in the structure CH3—C—N—CH3?
Tertiary (3°) amide
What is the main difference between a primary amide and a secondary amide?
The number of alkyl or aryl groups attached to the nitrogen atom
What is the general formula for a primary amide?
RCONH2
What is the primary function of reading the course guide prior to class?
To prepare for class discussions and participation
What is the general formula for amines?
NH2
How are amines classified?
As primary, secondary, and tertiary based on the molecular structure
What is the IUPAC rule for naming amines?
The alkane name is changed to amine and the chain is numbered to locate the amine group
What is a tertiary amine?
An amine with three carbon groups bonded to the nitrogen atom
What is the purpose of watching videos related to the topic?
To prepare for class discussions and participation
What is the main reason for the solubility of amines in water?
The polar N-H bond in amines forms hydrogen bonds with the polar O-H bond in water
What is a primary amine?
An amine with one carbon group bonded to the nitrogen atom
What is a characteristic of amines with respect to their boiling points?
Amines have higher boiling points than alkanes
What is the purpose of reading course outcomes?
To understand the expectations of the course
Which of the following statements is TRUE about the hydrogen bonding of amines?
Hydrogen bonding occurs only in 1° and 2° amines
What is the reactant that amines attract to form a conjugate acid?
H+
Which of the following compounds is NOT soluble in water?
CH3—CH2—CH2—CH3
What is the type of bond that the N atom in amines forms with water?
Hydrogen bond
Which of the following is a characteristic of 1° and 2° amines?
They undergo hydrogen bonding
What is the functional group present in amines?
-NH2
What is the result of neutralizing an amine with acid?
Formation of an amine salt
What is the name of the compound formed when methylamine reacts with water?
Methylammonium hydroxide
What is the general formula for naming an amine salt?
Replacing the amine part of the name with ammonium followed by the name of the negative ion
What functional group is replaced in carboxylic acids to form amides?
Hydroxyl group (-OH)
How are amides classified?
According to the number of carbon atoms bonded to the nitrogen atom
What is the product of the reaction between ethylamine and water?
Ethylammonium hydroxide
What is the role of an acid in the formation of an amine salt?
It acts as an acid to neutralize the amine
What is the name of the compound formed when methylamine reacts with HCl?
Methylammonium chloride
What is the functional group shown in the diagram?
Amide
What is the process of breaking an amide bond into a carboxylic acid and an amine or ammonia?
Hydrolysis
What is the bond that is broken during the hydrolysis of an amide?
Amide bond
What is the product of the hydrolysis of an amide?
Carboxylic acid and amine
What is the purpose of the references provided?
To provide additional information on the topic
What is the last message in the discussion?
Prepare for an online quiz
Study Notes
Checklist for Class
- Read course outcomes
- Read course guide prior to class
- Proactively participate in discussions
- Watch videos related to the topic
- Answer and submit course unit tasks
Amines
- Are derivatives of ammonia (NH3)
- Contain nitrogen (N) attached to one or more alkyl or aromatic groups
- Classified as primary (1°), secondary (2°), or tertiary (3°) based on the number of carbon groups bonded to the nitrogen atom
- IUPAC names are based on the longest chain and the amine group is indicated by changing the -e in the alkane name to -amine
Physical Properties of Amines
- Boiling points are higher than alkanes but lower than alcohols of similar mass
- Hydrogen bonding occurs in 1° and 2° amines, but not 3°
- Soluble in water if they have 1-5 carbon atoms due to hydrogen bonding with the polar O-H bond in water
Chemical Properties of Amines
- React as bases, attracting a H+ from H2O to the N atom
- Weak bases in water
- Neutralization forms amine salts, named by replacing the amine part of the name with ammonium followed by the name of the negative ion
Amides
- Formed when an amino group (-NH2) replaces the -OH group of carboxylic acids
- Classified as primary (1°), secondary (2°), or tertiary (3°) based on the number of carbon atoms bonded to the nitrogen atom
- Hydrogen bonding occurs between primary amides
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