Which of the given structurally represented compounds can exhibit tautomerism? — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

Tautomerism requires the presence of an acidic $\alpha$ -hydrogen adjacent to a carbonyl group (or similar electron-withdrawing system). $\alpha$ -hydrogens located at a bridgehead carbon (in bicyclic systems) cannot participate due to Bredt's Rule (violating ring strain constraints).