What is the IUPAC name of the given compound?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → N,N-Diethylbutan-1-amine
The compound is a tertiary amine: the nitrogen carries two ethyl groups and one butyl group, \( \ce{(C2H5)2N-CH2CH2CH2CH3} \).
Parent chain: the longest carbon chain on nitrogen is the butyl chain (4 C), numbered from the carbon joined to N, so the parent is butan-1-amine.
Substituents on nitrogen: the two ethyl groups get the locant N each: N,N-diethyl.
Name: N,N-Diethylbutan-1-amine (common name N,N-diethylbutylamine).
NCERT (2026-27 edition):
9.3 Nomenclature – “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. More examples are given in Table 9.1.”
Table 9.1: Nomenclature of Some Alkylamines and Arylamines
