The anisotropic effect depends upon the orientation of the molecule with respect to the applied field. In fact, a proton experiences three different fields, the applied field, the induced magnetic field generated by σ-electrons and the induced magnetic field generated by π-electrons.

What is an anisotropic effect?

Anisotropic effects include molecular orientation and filler particle alignment induced by shear stress during the injection molding process.

Which protons are Deshielded from anisotropic effect?

Well, protons on an aryl ring are said to be deshielded with respect to conventional protons, and their resonance occurs significantly downfield. The physical manifestation of this deshielding is the appearance of the protons of benzene at 7.15⋅ppm , way DOWNFIELD with respect to non-aromatic protons.