3.3.15
NMR
Spectroscopy
Section 3.3.15 covers nuclear magnetic resonance spectroscopy: ¹³C and ¹H NMR give information about the positions of carbon and hydrogen atoms in a molecule; chemical shift on the δ scale depends on the molecular environment; integration gives the relative numbers of protons; TMS is the standard; samples are dissolved in deuterated solvents or CCl₄; and the n + 1 rule explains spin–spin splitting.
Revision Notes
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Carbon-13 NMR Spectroscopy
¹³C NMR spectroscopy: carbon environments, number of peaks, chemical shift and deducing structures.
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Proton NMR Spectroscopy
¹H NMR spectroscopy: chemical shift, integration, the n + 1 rule and splitting patterns, and deducing structures from spectra.
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NMR Spectroscopy Map
AQA A-level Chemistry · 3.3.15 Nuclear magnetic resonance spectroscopy
The whole section on one A4 page: ¹³C NMR, TMS and solvents, ¹H shifts and areas, splitting, common patterns and deducing a structure.
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3.3.15
- iv
know that integrated spectra indicate the relative numbers of 1H atoms in different environments
Revise - ix a
use the n+1 rule to deduce doublet spin-spin splitting patterns of adjacent non-equivalent protons in aliphatic compounds
Revise - ix b
use the n+1 rule to deduce triplet spin-spin splitting patterns of adjacent non-equivalent protons in aliphatic compounds
Revise - ix c
use the n+1 rule to deduce quartet spin-spin splitting patterns of adjacent non-equivalent protons in aliphatic compounds
Revise - vii a
use 1H NMR spectra and chemical shift data to suggest possible structures or part structures for molecules
Revise - vii b
use 13C NMR spectra and chemical shift data to suggest possible structures or part structures for molecules
Revise - viii
use integration data from 1H NMR spectra to determine the relative numbers of equivalent protons in the molecule
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