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Question

1) Classify the following amines as primary, secondary or tertiary:

A)
2) Classify the following amines as primary, secondary or tertiary:
B)

3) Classify the following amines as primary, secondary or tertiary:
C) (C2H5)2CHNH2

4) Classify the following amines as primary, secondary or tertiary:

D) (C2H5)2NH

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Solution

A) Types of amines

Depending upon the number of hydrogen atoms that are replaced by an alkyl or aryl group in ammonia, amines are classified as primary (1), secondary (2) and tertiary (3).

If only one hydrogen atom is replaced then amines of the form RNH2 or primary amines (1) are obtained.

If two of the three hydrogen atoms are replaced by alkyl/aryl groups then secondary amines (2) are formed.

If all the three hydrogen atoms are replaced by alkyl/aryl group then tertiary amines(3) are obtained.

Classification of the given amines compound


N atom is directly connected with only one C atom (i.e. one aryl group), so it is a primary amine

B) Types of amines

Depending upon the number of hydrogen atoms that are replaced by an alkyl or aryl group in ammonia, amines are classified as primary (1), secondary (2) and tertiary (3).

If only one hydrogen atom is replaced then amines of the form RNH2 or primary amines (1) are obtained.

If two of the three hydrogen atoms are replaced by alkyl/aryl groups then secondary amines (2) are formed.

If all the three hydrogen atoms are replaced by alkyl/aryl group then tertiary amines(3) are obtained.

Classification of the given amines compound


In this compound N atom is directly connected with 3 carbon atoms (i.e. one aryl and 2 alkyl group). So, it is a tertiary amine.

C) Types of amines

Depending upon the number of hydrogen atoms that are replaced by an alkyl or aryl group in ammonia, amines are classified as primary (1), secondary (2) and tertiary (3).

If only one hydrogen atom is replaced then amines of the form RNH2 or primary amines (1) are obtained.

If two of the three hydrogen atoms are replaced by alkyl/aryl groups then secondary amines (2) are formed.

If all the three hydrogen atoms are replaced by alkyl/aryl group then tertiary amines(3) are obtained.

Classification of the given amines compound

(C2H5)2CHNH2

N atom is directly connected with only one C atom (i.e. one alkyl group). So, it is a primary amine.


D) Types of amines

Depending upon the number of hydrogen atoms that are replaced by an alkyl or aryl group in ammonia, amines are classified as primary (1), secondary (2) and tertiary (3).

If only one hydrogen atom is replaced then amines of the form RNH2 or primary amines (1) are obtained.

If two of the three hydrogen atoms are replaced by alkyl/aryl groups then secondary amines (2) are formed.

If all the three hydrogen atoms are replaced by alkyl/aryl group then tertiary amines(3) are obtained.

Classification of the given amines compound

(C2H5)2NH

In structure, we can clearly see that N is directly connected with 2 carbon atoms (i.e. 2 alkyl group). So, it is a secondary amine.


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