Class 12 Exam > Class 12 Questions > Which of the following is a tertiary amine?a)...
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Which of the following is a tertiary amine?
- a)cyclohexylamine
- b)N,N – dimethylaniline
- c)N – ethyl – 1 – propanamine
- d)3 – pentanamine
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Which of the following is a tertiary amine?a)cyclohexylamineb)N,N R...
C6H5N(CH,)2 this is tertiary amine.
Most Upvoted Answer
Which of the following is a tertiary amine?a)cyclohexylamineb)N,N R...
N,N-dimethylaniline (option B) is a tertiary amine.
Explanation:
Amines are organic compounds that contain a nitrogen atom bonded to one or more alkyl or aryl groups. They can be classified as primary, secondary, or tertiary based on the number of alkyl/aryl groups attached to the nitrogen atom.
Primary amines have one alkyl/aryl group attached to the nitrogen atom (R-NH2), secondary amines have two (R2NH), and tertiary amines have three (R3N).
Now let's analyze each option to determine which one is a tertiary amine:
A) Cyclohexylamine: This compound has a cyclohexyl group (C6H11) attached to the nitrogen atom. Since it has only one alkyl group, it is a primary amine, not a tertiary amine.
B) N,N-dimethylaniline: This compound has two methyl groups (-CH3) attached to the nitrogen atom. Since it has two alkyl groups, it is a secondary amine.
C) N-ethyl-1-propanamine: This compound has an ethyl group (-CH2CH3) attached to the nitrogen atom. Again, it has only one alkyl group, so it is a primary amine.
D) 3-pentanamine: This compound has a pentyl group (-C5H11) attached to the nitrogen atom. Similar to the previous options, it has only one alkyl group, making it a primary amine.
Therefore, the correct answer is option B, N,N-dimethylaniline, which is a tertiary amine because it has two methyl groups attached to the nitrogen atom.
Explanation:
Amines are organic compounds that contain a nitrogen atom bonded to one or more alkyl or aryl groups. They can be classified as primary, secondary, or tertiary based on the number of alkyl/aryl groups attached to the nitrogen atom.
Primary amines have one alkyl/aryl group attached to the nitrogen atom (R-NH2), secondary amines have two (R2NH), and tertiary amines have three (R3N).
Now let's analyze each option to determine which one is a tertiary amine:
A) Cyclohexylamine: This compound has a cyclohexyl group (C6H11) attached to the nitrogen atom. Since it has only one alkyl group, it is a primary amine, not a tertiary amine.
B) N,N-dimethylaniline: This compound has two methyl groups (-CH3) attached to the nitrogen atom. Since it has two alkyl groups, it is a secondary amine.
C) N-ethyl-1-propanamine: This compound has an ethyl group (-CH2CH3) attached to the nitrogen atom. Again, it has only one alkyl group, so it is a primary amine.
D) 3-pentanamine: This compound has a pentyl group (-C5H11) attached to the nitrogen atom. Similar to the previous options, it has only one alkyl group, making it a primary amine.
Therefore, the correct answer is option B, N,N-dimethylaniline, which is a tertiary amine because it has two methyl groups attached to the nitrogen atom.
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Which of the following is a tertiary amine?a)cyclohexylamineb)N,N R...
C6H5-N-(CH3)2. tertiary amine
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Which of the following is a tertiary amine?a)cyclohexylamineb)N,N – dimethylanilinec)N – ethyl – 1 – propanamined)3 – pentanamineCorrect answer is option 'B'. Can you explain this answer?
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