For a standard carbonyl compound to successfully exhibit keto-enol tautomerism, which of the followi — Isomerism and Stereochemistry Chemistry Question

💡 Solution & Explanation

To exhibit standard keto-enol tautomerism, a carbonyl compound requires an $sp^3$ hybridized $\alpha$ -carbon immediately adjacent to the electron-withdrawing $C=O$ group. This carbon must possess at least one mobile/acidic $\alpha$ -hydrogen atom capable of oscillating. A $\beta$ -hydrogen is not the standard requirement, and tautomerism is typically observed in liquid or solution phases, not strictly gaseous.