Carboxylic Acid - Amide

Question 1

Amides

Answer 1

• formed from the condensation of an acid and amine

O
||
-C-NH2

• Amides are part acids and part amines

Question 2

Nomenclature of Amides

Answer 2

1. if two hydrogens are on nitrogen it is a primary amide and is named by dropping the -oic acid and adding -amide
2. if the nitrogen is substituted with one or more alkyl groups it is named as in step one and the alkyl groups are indicated as a prefix N-alkyl-
3. one alkyl group attached is a secondary amide, two alkyl groups attached is a tertiary amide.

Question 3

Properties of Amides

Answer 3

• possess high melting points
• all primary amides are solids at room temperature (except formamide)
• water soluble if total number of carbons is less than 4 atoms.

Question 4

Select the structure that corresponds to the name:

N-ethylethanamide

Answer 4

C

Question 5

Select the structure that corresponds to the name:

N,N-diethylpropanamide

Answer 5

B

Question 6

Classify the following amide as primary, secondary, or tertiary.

           O  
            || CH3CH2CNHCH3

Answer 6

B

Question 7

Classify the following amide as primary, secondary, or tertiary.

    O
    || CH3CNH3

Answer 7

A

Question 8

Select the structure that corresponds to the name:

propanamide

Answer 8

A

Question 9

What is the name of the following amide:

    O
    || CH3CNH2

Answer 9

Ethanamide

Question 10

Classify the following amide as primary, secondary, or tertiary.

                       O
                        ||
CH3CH2CH2CN-CH3
                          |
                         CH3

Answer 10

C

Question 11

What is the name of the following amide:

            O
            || CH3CH2CNHCH3

Answer 11

N-methylpropanamide

Question 12

What is the name of the following amide:

                        O
                        ||
CH3CH2CH2CN-CH3
                          |
                         CH3

Answer 12

N,N-dimethylbutanamide