What is the correct IUPAC name of the compound $C H_{3} C H_{2} C H_{2} C H_{2} N H_{2}$ ?

easy MCQ 1 mark Class 12 · Chemistry · Amines

Answer

butan-1-amine

The correct answer is butan-1-amine — Combine the parent name and the suffix to obtain "butan-1-amine".

Step-by-step solution

Identify the longest carbon chain attached to the $- N H_{2}$ group; it contains four carbon atoms.
Number the chain so that the $- N H_{2}$ group gets the lowest possible locant; this gives the carbon bearing $- N H_{2}$ as C-1.
Replace the suffix "-ane" of the parent alkane (butane) by "-amine" and add the locant 1.
Combine the parent name and the suffix to obtain "butan-1-amine".

Common mistake: Assigning the locant to the

- N H_{2}

group as the highest number instead of the lowest

Concept tested: Nomenclature of aliphatic primary amines