Question

Classify each of the following amines as primary $\left(1^{\circ }\right)$, secondary $\left(2^{\circ }\right)$, or tertiary $\left(3^{\circ }\right)$:

a.

b.

c.

d.

Short answer

(part a) The amine in question is a Primary $\left(1^{\circ }\right)$amine.

(part b) The amine in question is a Tertiary $\left(3^{\circ }\right)$amine.

(part c) The amine in question is a Primary $\left(1^{\circ }\right)$amine.

(part d) The amine in question is a Secondary $\left(2^{\circ }\right)$amine.

Step-by-step solution

Introduction. (part  a)

Primary $\left(1^{\circ }\right)$amines are those in which the nitrogen atom is bound to one alkyl group. Secondary$\left(2^{\circ }\right)$amines with two alkyl groups bound to the nitrogen atom. Tertiary $\left(3^{\circ }\right)$amines with three alkyl groups bound to the nitrogen atom.

Given Information (part a).

To identify if the amines are primary, secondary or tertiary.

Explanation (part a).

It is categorized as a primary amine. The nitrogen atom in this structure is bound to one alkyl group.

Given Information (part b).

To find the amines are primary, secondary or tertiary.

Explanation (part b).

It is categorized as a Tertiary$\left(3^{\circ }\right)$ amine. The nitrogen atom in this structure is bound to three different alkyl groups.

Given Information (part c).

To find the amines are primary, secondary or tertiary.

Explanation (part c).

It is categorized as a primary $\left(1^{\circ }\right)$amine. The nitrogen atom in this structure is bound to one alkyl group.

Given Information (part d).

To find the amines are primary, secondary or tertiary.

Explanation (part d).

It is categorized as a Secondary$\left(2^{\circ }\right)$amine. The nitrogen atom in this structure is bound to two different alkyl groups.