Learning objective

Use carbon-13 NMR spectra to identify carbon environments.

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Topic

Nuclear magnetic resonance spectroscopy (A-level only)

Subtopic

NMR spectroscopy (A-level only)

Aqa A Level ChemistryOrganic chemistry

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Quick explanation

Use carbon-13 NMR spectra to identify carbon environments

This point belongs to Nuclear magnetic resonance spectroscopy (A-level only), especially NMR spectroscopy (A-level only).
You need to be able to use carbon-13 NMR spectra to identify carbon environments.
The key ideas to know are carbon-13 and NMR.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

carbon-13NMR

Why it matters

This objective helps connect NMR spectroscopy (A-level only) to exam-style questions, flashcards, and revision notes for Nuclear magnetic resonance spectroscopy (A-level only).

Quick student answer

In a carbon-13 NMR spectrum, what does a peak at 100 ppm typically indicate?

Direct answer

A carbon atom in an aromatic ring

Key terms

Chemical Shift: The difference in resonance frequency of a nucleus compared to a standard reference, measured in parts per million (ppm).
Integration: The area under a peak in an NMR spectrum, which corresponds to the number of nuclei contributing to that peak.

Common trap

Misinterpreting chemical shifts: Refer to a chemical shift table to accurately identify the functional groups based on the observed ppm values.

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Question 1

In a carbon-13 NMR spectrum, what does a peak at 100 ppm typically indicate?

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