Question 8 of 20beginner💡 UnderstandShort Answer3 marks

Write IUPAC names of the following compounds and classify them into primary, secondary and tertiary amines. (i) (CH₃)₂CHNH₂ (ii) CH₃(CH₂)₂NH₂ (iii) CH₃NHCH(CH₃)₂ (iv) (CH₃)₃CNH₂ (v) C₆H₅NHCH₃ (vi) (CH₃CH₂)₂NCH₃ (vii) m-BrC₆H₄NH₂

(i)
Answer

Propan-2-amine; Primary amine

(ii)
Answer

Propan-1-amine; Primary amine

(iii)
Answer

N-Methylpropan-2-amine; Secondary amine

(iv)
Answer

2-Methylpropan-2-amine; Primary amine

(v)
Answer

N-Methylaniline; Secondary amine

(vi)
Answer

N-Ethyl-N-methylethanamine; Tertiary amine

(vii)
Answer

3-Bromoaniline; Primary amine

Explanation

According to the IUPAC system, primary amines are named as alkanamines by replacing 'e' of alkane with 'amine'. For secondary and tertiary amines with different alkyl groups, the largest alkyl group forms the parent chain and smaller groups are prefixed with N- to indicate attachment to nitrogen. Amines are classified based on the number of alkyl groups attached to the nitrogen atom: primary (one alkyl group), secondary (two alkyl groups), and tertiary (three alkyl groups).

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