What is the correct decreasing order of boiling points for the following isomeric amines of molecula — Amines Chemistry Question

💡 Solution & Explanation

Boiling point strongly depends on the extent of intermolecular hydrogen bonding. 1-Butanamine ($1^\circ$) has two $N-H$ bonds for extensive H-bonding. Diethylamine ($2^\circ$) has one $N-H$ bond. Ethyldimethylamine ($3^\circ$) lacks $N-H$ bonds entirely, relying only on weak dipole interactions. Therefore, $1^\circ > 2^\circ > 3^\circ$.