CAIE A-Level Chemistry 33.1.1 Preparation of Benzoic Acid
Practise converting an alkylbenzene such as methylbenzene into benzoic acid by side-chain oxidation.
- Syllabus
- 2028–2030
- Course
- Chemistry 9701
- Level
- A2
Exam points
- heat the alkylbenzene with alkaline KMnO4 so an oxidisable side-chain is converted to benzoate
- acidify the reaction mixture with dilute acid after oxidation to obtain the carboxylic acid
- draw benzoic acid as C6H5COOH when methylbenzene is the starting alkylbenzene example
33.1.1—Preparation of benzoic acid question 1
Benzophenone can be synthesised from benzoic acid in two steps as shown.
In step 1 compound J, a reactive reaction intermediate, is formed.
Compound J then reacts with an organic compound, K, to form benzophenone.
benzoic acid
Suggest reagents and conditions for step 1.
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