Origin of the NMR Effect

Atomic nuclei with spin 1 0, when placed into a magnetic field, 

When a magnetic field (the symbol for which is B) is applied to nuclei with spin quantum number 0, the nuclei can adopt (2/+ 1) orientations in the field (Box 4.2), and the NMR selection rule states that transitions with Azu/ = 1 are allowed. For a nucleus with spin 1 = (such as H, 

F and P), there are therefore two possible arrangements either aligned with (lowest energy state, a, mj = ) or aligned against  

As you can imagine, the size of the magnetic field generated by a single 

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Understand the origin of the NMR effect, chemical shifts and coupling... 

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