CAIE A Level Chemistry 9701 · Analytical techniques
A compound with molecular formula produces a carbon-13 NMR spectrum with two distinct peaks.
Explain what this observation indicates about the carbon environments in the molecule, and suggest two possible structures for the compound that are consistent with this spectrum.
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Explain means: Give the reasons or the mechanism: why or how something happens. Link each point to the next with because, so or which means. A list of facts with no links usually loses the reasoning marks.
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