NMRRingströme
NMRRingströme refers to the anisotropic magnetic effects that arise from the delocalized pi electrons in aromatic rings when placed in an external magnetic field. These delocalized electrons are free to move in a circular path around the ring, creating their own induced magnetic field. This induced field interacts with the external field, leading to a significant shielding or deshielding effect on nuclei located in different positions relative to the ring.
In the case of aromatic systems like benzene, the pi electrons circulate above and below the plane
This phenomenon is a crucial diagnostic tool in organic chemistry for identifying aromatic compounds and determining