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A-LevelChemistryAnalytical techniquesFeb/Mar 2018Paper 4 Q914 Marks

Two molecules of compound F react together under suitable conditions to form compound G. Some information about compounds F and G is given. • The mass spectrum of F has a peak due to the molecular ion at m/e = 106, and a peak at m/e = 107 with an abundance 8% of the 106 peak. • The mass spectrum of G has a peak due to the molecular ion at m/e = 212, and major peaks at m/e = 91 and m/e = 105. • Both F and G contain oxygen and are neutral compounds which are insoluble in water. • The ¹H NMR spectrum of F includes a singlet peak at δ = 10.0 due to one proton. • The ¹H NMR spectrum of G includes a singlet peak at δ = 5.1 due to two protons. • When G is heated with dilute sulfuric acid, benzoic acid, C₆H₅CO₂H, and phenylmethanol, C₆H₅CH₂OH, are produced. Use this information to answer (i)–(vi).

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About This A-Level Chemistry Question

This structured question appeared in the Cambridge A-Level Chemistry (9701) Feb/Mar 2018 examination, Paper 4 Variant 2. It tests the topic of Analytical techniques and is worth 14 marks.

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