CHEM 130 Lecture Notes - Lecture 13: Proton Nuclear Magnetic Resonance, Natural Abundance, Chemical Shift
Document Summary
We used 13c nmr in chapter 3 as part of a three-pronged attack on the problem of determining molecular structure. This is that delayed chapter and we must now tackle those complications. We hope you will see 1h nmr for the beautiful and powerful technique that it surely is. The difficulties are worth mastering for this is the chemist"s primary weapon in the battle to solve structures. We shall examine each of these points in detail and build up a full understanding of proton nmr spectra. Proton nmr spectra are recorded in the same way as 13c nmr spectra: radio waves are used to study the energy level differences of nuclei, but this time they are 1h and not 13c nuclei. Hydrogen nuclei have a nuclear spin of a half and so have two energy levels: they can be aligned either with or against the applied magnetic field.
