Long answer·Hard exam skill (4/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
Plan a conversion of bromoethane to propan-1-amine using a one-carbon chain-extension route. Do not use direct ammonolysis as the main step. Give the intermediate and reagents.
Total: 4 marks
(a) Write the first reagent and intermediate. (1 mark)
(b) Write the second reagent and final product. (1 mark)
(c) Explain why the route increases the carbon chain by one. (1 mark)
(d) Give one reason direct ammonolysis of bromoethane is unsuitable for this target. (1 mark)
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