Carbon Nuclear Magnetic Resonance (13C-NMR) Spectroscopy

Nuclear Magnetic Resonance (NMR) Spectroscopy is not limited to the study of protons. Any element with a nuclear spin (13C, 17O, 19F, 31P and many others) will give rise to an NMR signal.

Carbon-13 has a nuclear spin (I = ½) and makes up 1.1% of all naturally occurring carbon, a high enough abundance along with modern technology to make carbon nuclear magnetic resonance spectroscopy (13C-NMR) a useful technique. Since carbon is the element central to organic chemistry, 13C-NMR plays an important role in determining the structure of unknown organic molecules and the study of organic reactions and processes.

The idea and theory behind 13C-NMR is the same as with 1H-NMR, just a different nucleus, so you really do not have to learn anything new to understand and interpret 13C-NMR's to help you solve structures of unknown organic compounds.

In particular, the13C-NMR spectrum of an organic compound provides information concerning:

The major differences that you will notice in 13C-NMR in comparison to 1H-NMR spectra include:

Use the index on the left to choose which topic you want to go.
If you are pretty good at interpreting 13C-NMR, you may want to go straight to the exercises. If not, maybe you could visit the tutorial pages and take the included quizzes.