C13 NMR 1H 13C 15N 19F Common nuclei which have a magnetic moment:

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Presentation transcript:

C13 NMR 1H 13C 15N 19F Common nuclei which have a magnetic moment: (Odd mass number or even mass number and odd atomic number)

C13 Only 1.1% of the carbon atoms in a sample are C13 C12 does not have a magnetic moment.

C13 NMR Signal weak No C-C coupling Strong C-H coupling Large Chemical Shifts

C13 Chemical Shifts ppm from TMS 65 - 90 0 - 35 15 -40 100 - 150 25 - 50 110 - 175 25 - 50 190 - 220

Proton NMR Spectrum

Carbon NMR Spectrum (Proton Decoupled)

Peak height (area) NOT proportional to number of C atoms.

Proton decoupled CMR

Proton coupled CMR

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