What is the IUPAC name of the given compound?

The correct answer is Option (4) → N-Methyl-2-nitropropan-1-amine

The compound is \( \ce{CH3-NH-CH2-CH(CH3)-NO2} \), a secondary amine. The amine group is the principal group; the nitro group is named only as a prefix.

• Parent chain: the larger carbon group on N, \( \ce{-CH2-CH(NO2)-CH3} \), has three carbons: propane.

• Numbering: C1 is the carbon bonded to N, so the amine is propan-1-amine.

• Substituent on C2: –NO₂, so 2-nitro.

• Substituent on N: the \( \ce{CH3} \) group, given the locant N: N-methyl.

• Name: prefixes in alphabetical order (methyl before nitro): N-methyl-2-nitropropan-1-amine.

NCERT (2026-27 edition):
9.3 Nomenclature – “… In IUPAC system, primary amines are named as alkanamines. The name is derived by replacement of ‘e’ of alkane by the word amine. … To name secondary and tertiary amines, we use locant N to designate substituent attached to a nitrogen atom. For example, CH₃NHCH₂CH₃ is named as N-methylethanamine and (CH₃CH₂)₃N is named as N, N- diethylethanamine.”