Chemical
Shift
Up
to this point, we have been treating nuclei in general terms.
Simply
comparing 1H, 13C, 15N etc.
If all 1H resonate at 500MHz at a field
strength of 11.7T,
NMR would not be very interesting
Beff = Bo - Bloc --- Beff = Bo( 1 - s )
s is the magnetic
shielding of the nucleus
The chemical environment for each nuclei results in a unique local
magnetic field (Bloc)
for each nuclei: