A-LevelChemistryOrganic synthesis9701/12 · May/June 2015 · Q231 Mark

Butanedioic acid may be synthesised in two steps from 1,2-dibromoethane. BrCH₂CH₂Br --step 1--> X --step 2--> HO₂CCH₂CH₂CO₂H Which reagents could be used for this synthesis? step 1 step 2

AHCN(g), HCl(aq)

BHCO₂Na(aq), HCl(aq)

CKCN(alcoholic), H₂SO₄(aq)

DNaOH(aq), K₂Cr₂O₇/H₂SO₄(aq)

✓ Correct answer

C: KCN(alcoholic), H₂SO₄(aq)

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Topic: Organic synthesis, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2015 Paper 1 Variant 2, question 23.

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