Question

Which of the following is not a \(3^{\circ}\) amine? (A) CN(C)C (B) \(\mathrm{CH}_{3}-\mathrm{NH}-\mathrm{Et}\) (C) \(\mathrm{CH}_{3}-\mathrm{NH}-\mathrm{CH}_{3}\) (D) \(\mathrm{CH}_{3}-\mathrm{NH}_{2}\)

Short answer

All the options (A), (B), (C), and (D) are not 3° amines, but Choice A is the closest to being a 3° amine.

Step-by-step solution

Choice A: \(CN(C)C\)

To analyze Choice A, let's first convert the SMILES notation to a structural formula. The structure of this compound is: H₃C-N(C₂H₅)(C₂H₅). We can see that the nitrogen atom is bonded to three alkyl groups (two ethyl and one methyl). Thus, it is a 3° amine.

Choice B: \(\mathrm{CH}_{3}-\mathrm{NH}-\mathrm{Et}\)

To analyze Choice B, let's first understand that Et stands for an ethyl group (C₂H₅). The structure of this compound is: H₃C-NH-C₂H₅. We can see that the nitrogen atom is bonded to two alkyl groups (one ethyl and one methyl) and one hydrogen atom. Thus, it is a 2° amine.

Choice C: \(\mathrm{CH}_{3}-\mathrm{NH}-\mathrm{CH}_{3}\)

In Choice C, the structure of this compound is: H₃C-NH-CH₃. We can see that the nitrogen atom is bonded to two alkyl groups (two methyl groups) and one hydrogen atom. Thus, it is a 2° amine.

Choice D: \(\mathrm{CH}_{3}-\mathrm{NH}_{2}\)

In Choice D, the structure of this compound is: H₃C-NH₂. We can see that the nitrogen atom is bonded to one alkyl group (one methyl group) and two hydrogen atoms. Thus, it is a 1° amine. Based on the analysis of each choice, we can conclude that:

Answer

The correct answer is that all the options (A), (B), (C), and (D) are not 3° amines. However, Choice A is the closest to being a 3° amine.