What is the correct order of boiling points for the following isomeric amines of molecular formula ? — Amines Chemistry Question

💡 Solution & Explanation

Boiling point in amines depends heavily on the extent of intermolecular hydrogen bonding. 1-Butanamine ($1^\circ$) has two $N-H$ bonds, leading to extensive hydrogen bonding. Diethylamine ($2^\circ$) has only one $N-H$ bond, leading to weaker association. Ethyldimethylamine ($3^\circ$) has no $N-H$ bonds and lacks intermolecular H-bonding altogether. Thus, the order is $1^\circ > 2^\circ > 3^\circ$.