Which of the following pairs of compounds are functional isomers of each other? — Amines Chemistry Question

💡 Solution & Explanation

Primary ($1^\circ$), secondary ($2^\circ$), and tertiary ($3^\circ$) amines are considered functional isomers of one another because their chemical properties and reactivity (e.g., reaction with nitrous acid or carbylamine test) differ significantly. Therefore, an isomer pair mixing degrees (1° vs 2°, 2° vs 3°, 1° vs 3°) are functional isomers. Option B consists of two primary amines, so they are position isomers.