A-LevelChemistryCarbonyl compounds9701/12 · Oct/Nov 2009 · Q271 Mark

Cyanohydrins can be made from carbonyl compounds by generating CN⁻ ions from HCN in the presence of a weak base. [Figure 27.1] In a similar reaction, ⁻CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an aldehyde and CH3CO2CH3 in the presence of a strong base?

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ACH3CH(OH)CO2CH3

BCH3CO2CH2CH(OH)CH3

CCH3CH2CH(OH)CH2CO2CH3

D(CH3)2C(OH)CH2CO2CH3

✓ Correct answer

C: CH3CH2CH(OH)CH2CO2CH3

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Topic: Carbonyl compounds, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2009 Paper 1 Variant 2, question 27.

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