Arrange the following 5-membered aromatic heterocycles in decreasing order of their reactivity towar — Aromatic Hydrocarbons Chemistry Question

💡 Solution & Explanation

Reactivity depends on the heteroatom's +M ability. Nitrogen (least electronegative) accommodates a positive charge most readily (Pyrrole). Sulfur's larger 3p orbital overlaps poorly with Carbon's 2p orbital (Thiophene least reactive).