Advanced
Organic Chemistry: Carbon-13 NMR spectrum of ethanol
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The Carbon-13 NMR spectrum of ethanol
(ethyl alcohol)
Doc Brown's
Chemistry Advanced Level Pre-University Chemistry Revision Study Notes for UK IB
KS5 A/AS GCE advanced A level organic chemistry students US K12 grade 11 grade 12 organic chemistry
courses involving molecular spectroscopy analysing C-13 NMR spectra
TMS is the acronym for tetramethylsilane, formula Si(CH3)4,
whose 13C atoms are arbitrarily given a chemical shift of 0.0
ppm. This is the 'standard' in 13C NMR spectroscopy and all other
13C shifts, called chemical shifts, depend on the
individual (electronic) chemical environment of the 13C atoms in
an organic molecule - ethanol here.
Ethanol C2H6O,
,
,
,
Interpreting the C-13 NMR spectrum of ethanol
As you can see from the diagram above there are only
2 chemical shift lines in the C-13 NMR spectrum of ethanol
indicating 2 different chemical environments of carbon atoms.
CH3CH2 OH
(note the colours indicating the
different chemical environment of the carbon atoms).
Key words & phrases: Interpreting the C-13 NMR spectra of ethanol, C-13 nmr spectrum of
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ethanol, ppm
chemical shifts of the C-13 nmr spectrum of ethanol, how to construct the diagram of
the C-13 nmr spectrum of ethanol, how to analyse the chemical shifts in the
carbon-13 NMR spectrum of ethanol
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The chemistry of ALCOHOLS
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