The addition of saturated aqueous Sodium bisulphite () is used for the purification of carbonyls. Wh — Aldehydes Ketones and Carboxylic Acids Chemistry Question
Question
The addition of saturated aqueous Sodium bisulphite ($NaHSO_3$) is used for the purification of carbonyls. Which of the following compounds will NOT form the crystalline bisulphite adduct?
Answer: D
💡 Solution & Explanation
The $NaHSO_3$ addition is highly sensitive to steric hindrance. It works for aldehydes and unhindered methyl ketones (like acetone) but completely fails for bulky ketones like acetophenone or benzophenone.
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