Respuesta :
Answer:
The correct answer is b) B) (CH₃)₃CNH₂
Explanation:
Let's break down the structure of each compound and identify the type of amine it represents:
A) CH₃CH₂N(CH₃)₂ - This compound is a secondary amine because it has two alkyl groups (CH₃) bonded to the nitrogen atom. In a tertiary amine, there would be three alkyl groups bonded to the nitrogen atom.
B) (CH₃)₃CNH₂ - This compound is a tertiary amine because it has three methyl groups (CH₃) bonded to the nitrogen atom. Since there are three alkyl groups bonded to the nitrogen, it meets the criteria for a tertiary amine.
C) CH₃CH₂NHCH₃ - This compound is a secondary amine because it has only one alkyl group (CH₃) bonded to the nitrogen atom. In a tertiary amine, there would be three alkyl groups bonded to the nitrogen atom.
D) CH₃CH₂NHCH(CH₃)₂ - This compound is a secondary amine because it has two alkyl groups (CH₃) bonded to the nitrogen atom. In a tertiary amine, there would be three alkyl groups bonded to the nitrogen atom.
So, among the given options, only option B represents a tertiary amine because it has three alkyl groups bonded to the nitrogen atom.
Final answer:
CH3CH2N(CH3)2 is a tertiary amine because the nitrogen atom is bonded to three alkyl groups, which fits the general formula for a tertiary amine, R3N. Therefore, the correct option is A.
Explanation:
To determine which compound is a tertiary amine, we must identify the compound in which the nitrogen atom is bonded to three alkyl groups. A tertiary amine is denoted as R3N where R represents an alkyl group.
- A) CH3CH2N(CH3)2 - Here, the nitrogen is bonded to three carbon-containing groups: one ethyl (CH3CH2-) and two methyl (CH3-) groups. Thus, this is a tertiary amine.
- B) (CH3)3CNH2 - This compound has a nitrogen bonded to only one carbon group (a tert-butyl group), with two hydrogens also attached. Therefore, it's a primary amine.
- C) CH3CH2NHCH3 - The nitrogen here is attached to two carbon groups (ethyl and methyl) and one hydrogen, making it a secondary amine.
- D) CH3CH2NHCH(CH3)2 - In this compound, although the nitrogen is bonded to three carbon atoms, it is only bonded to two alkyl groups (ethyl and isopropyl), with one hydrogen attached, classifying it as a secondary amine.
The correct answer for a tertiary amine is A) CH3CH2N(CH3)2.
