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Carbon chemical shifts ring current

As already mentioned, the application of H chemical shifts for the estimation charge density (KH) is not straightforward. The chemical shifts, (8N), considered should represent values which have been corrected for the influence of the induced magnetic fields (ring-current effect). From carbon chemical shifts, which are insensitive to ring current effects along the perimeter of the molecule, the local charge densities, qn can be estimated (Eq. 6) ... [Pg.104]

DuVernet, R. and Boekelheide, V., Nuclear magnetic resonance spectroscopy ring-current effects on carbon-13 chemical shifts, Proc. Natl. Acad. Sci. U.S.A., 71, 2961, 1974. [Pg.429]

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Carbonate, chemical

Chemical shift, carbon

Ring Carbon

Ring current

Ring current shift