Question

What type of amine is \((\text{C}_{2}\text{H}_{5})_{2}\text{NH}\)?

• A. \(1^{\circ }\) amines
• B. \(3^{\circ }\) amine
• C. \(2^{\circ }\) Unsymmetrical Amines
• D. \(2^{\circ }\) symmetrical amines

Hint:

Count the alkyl groups on nitrogen, then check whether they are the same or different.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept
The class of an amine depends on the number of alkyl or aryl groups on nitrogen: one gives primary, two gives secondary and three gives tertiary.

Step 2: Apply to the compound
In \((\text{C}_2\text{H}_5)_2\text{NH}\) the nitrogen carries two alkyl groups and one hydrogen, so it is a secondary amine (diethylamine).

Step 3: Symmetrical or not
Both groups on nitrogen are ethyl, which are identical, so it is a simple (symmetrical) amine. An amine with different groups, like \(\text{C}_2\text{H}_5\text{NHCH}_3\), would be unsymmetrical.

Final Answer:
It is a secondary symmetrical amine. \[ \boxed{\text{(D) }2^{\circ}\text{ symmetrical amines}} \]