A-LevelChemistryIntroduction to organic chemistry9701/41 · May/June 2024 · Q88 Marks

Neotame is an artificial sweetener added to some foods. [Figure 8.1]

(a)(i)State the number of chiral carbon atoms in a molecule of neotame.[1]
(a)(ii)Neotame contains the arene functional group. Identify all the other functional groups present in neotame.[2]
(b)(i)Neotame reacts with an excess of hot NaOH(aq) to form three organic products. State the two types of reaction that occur when neotame reacts with hot NaOH(aq). 1 2[2]
(b)(ii)Draw the structures of the three organic products formed from the reaction of neotame with an excess of hot NaOH(aq).[3]

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Mark scheme

Marking points from the official mark scheme (May/June 2024). The mark or mark type is shown in brackets.

[1] two
[1] amide / amine / ester / carboxylic acid / carboxyl / any two [1] all four [2]
[1] M1 hydrolysis
[1] M2 acid-base
[3] one mark for each structure

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Topic: Introduction to organic chemistry, A-Level Chemistry (syllabus 9701). Structured question, 8 marks.
Source: A-Level Chemistry, May/June 2024 Paper 4 Variant 1, question 8.

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