(i) Write structures of different isomeric amines corresponding to the molecular formula, C4H11N
(ii) Write IUPAC names of all the isomers.
(iii) What type of isomerism is exhibited by different pairs of amines?
(i), (ii) The structures and their IUPAC names of different isomeric amines corresponding to the molecular formula, C4H11N are given below:
(a) CH3-CH2-CH2-CH2-NH2
Butanamine (10)
(b) 
Butan-2-amine (10)
(c) 
2-Methylpropanamine (10)
(d)
2-Methylpropan-2-amine (10)
(e) CH3-CH2-CH2-NH-CH3
N-Methylpropanamine (20)
(f) CH3-CH2-NH-CH2-CH3
N-Ethylethanamine (20)
(g)
N-Methylpropan-2-amine (20)
(h)
N,N-Dimethylethanamine (3°)
(iii) The pairs (a) and (b) and (e) and (g) exhibit position isomerism.
The pairs (a) and (c); (a) and (d); (b) and (c); (b) and (d) exhibit chain isomerism.
The pairs (e) and (f) and (f) and (g) exhibit metamerism.
All primary amines exhibit functional isomerism with secondary and tertiary amines and vice-versa.
The reaction between A and B is first order with respect to A and zero order with respect to B. Fill in the blanks in the following table:
| Experiment |
A/ mol L - 1 |
B/ mol L - 1 |
Initial rate/mol L - 1 min - 1 |
| I | 0.1 | 0.1 |
2.0 × 10 - 2 |
| II | -- | 0.2 |
4.0 × 10 - 2 |
| III | 0.4 | 0.4 | -- |
| IV | -- | 0.2 |
2.0 × 10 - 2 |
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(i), (ii) The structures and their IUPAC names of different isomeric amines corresponding to the molecular formula, C4H11N are given below:
(a) CH3-CH2-CH2-CH2-NH2
Butanamine (10)
(b)
Butan-2-amine...
Step-by-step explanation:
• (i), (ii) The structures and their IUPAC names of different isomeric amines corresponding to the molecular formula, C4H11N are given below:
•
• (a) CH3-CH2-CH2-CH2-NH2
•
• Butanamine (10)
Students often lose marks by skipping steps, writing incomplete explanations, or misunderstanding keywords used in the question.
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