When the molecule is exposed to B 0 , these pelectrons begin to circulate in a ring current, generating their own induced magnetic field that opposes B 0 . In this case, however, the induced field of ...When the molecule is exposed to B 0 , these pelectrons begin to circulate in a ring current, generating their own induced magnetic field that opposes B 0 . In this case, however, the induced field of the pelectrons does not shield the benzylic protons from B 0 as you might expect– rather, it causes the protons to experience a stronger magnetic field in the direction of B 0 – in other words, it adds to B 0 rather than subtracting from it.
