8.4.4 - Reactions due to a-hydrogen
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Practice Questions
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What makes α-hydrogens in aldehydes and ketones acidic?
💡 Hint: Think about what happens to the electron cloud around the carbonyl group.
Name the product of an aldol reaction between two ethanal molecules.
💡 Hint: Combine two ethanal molecules and add a hydroxyl group at the β-position.
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Interactive Quizzes
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Which condition is necessary for aldol condensation to occur?
💡 Hint: What medium helps form an enolate ion?
Cross aldol condensation always results in a single product.
💡 Hint: Think about the number of possible combinations of reactants.
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Challenge Problems
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Predict the products of a cross aldol reaction between cyclopentanone and benzaldehyde.
💡 Hint: Determine which compound forms the enolate and which acts as electrophile.
Design a reaction sequence starting from propanal to synthesize an α,β-unsaturated aldehyde via aldol condensation.
💡 Hint: Use the same molecule as both enolate and electrophile.
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