Basic principles of NMR

Basic principles of NMR What s going on? Alexandre Arnold Departement of Chemistry May 22, 2017 At the heart of NMR: the nuclear spin NMR exploits the nuclear spin to gain information on the structure and dynamics of systems The spin is a property described by quantum mechanics with no macroscopic equivalence Not all the nuclei have a spin Only those with an odd mass number (A) or atomic number (Z) Most nuclei are NMR-active 2 At the heart of NMR: the nuclear spin Most nuclei have at least one NMR-active isotope 3 At the heart of NMR: the nuclear spin Organic nuclei have at least one NMR-active isotope! Despite low natural abundance of 13C you can usually do 1D and Basic 2D 15N tougher but 2D sometimes can work Isotopic enrichment sometimes necessary for more subtle information ( more sophisticated experiments) 4 The spin property has an associated angular moment (I) Behaves as if the nucleus rotated (it does not!)

Basic principles of NMR What’s going on? Alexandre Arnold Departement of Chemistry May 22, 2017 . At the heart of NMR: the nuclear spin NMR exploits the nuclear spin to gain information on the structure and dynamics of systems The spin is a …

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