Question

Identify an aromatic, mixed, 3º amine among the following compounds.

• A. $C_6H_5NHC_2H_5$
• B. $(C_2H_5)_3N$
• C. $(CH_3)_3N$
• D. $C_6H_5N(CH_3)_2$

Answer 1

Answer: (D)

Option (D)

Answer 2

For a compound to be a tertiary (3º) amine, the nitrogen atom must be bonded to three carbon groups. To be aromatic, at least one of these groups must be an aromatic ring. Examining the options:

• (A) $C_6H_5NHC_2H_5$: Here, the nitrogen is bonded to a phenyl group and an ethyl group. This is a secondary amine.
• (B) $(C_2H_5)_3N$: This is a tertiary amine but all three groups are ethyl groups (no aromatic ring).
• (C) $(CH_3)_3N$: This is a tertiary amine with three methyl groups (again, no aromatic ring).
• (D) $C_6H_5N(CH_3)_2$: Here, the nitrogen atom is bonded to one phenyl group (aromatic) and two methyl groups, making it a mixed tertiary amine.

Thus, the aromatic, mixed, 3º amine is option (D).