A-LevelChemistryCarbonyl compounds9701/12 · Oct/Nov 2011 · Q231 Mark
Ethanal, CH3CHO, can be reduced using NaBH4 in aqueous ethanol. This is a nucleophilic addition reaction. What could be the first step of this mechanism?
Aattack of an H⁻ ion at the carbon atom of the carbonyl group
Battack of an H⁻ ion at the oxygen atom of the carbonyl group
Cattack of an H⁺ ion at the carbon atom of the carbonyl group
Dattack of an H⁺ ion at the oxygen atom of the carbonyl group
✓ Correct answer
A: attack of an H⁻ ion at the carbon atom of the carbonyl group
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