Diamagnetic Anisotropy – H NMR Spectroscopy – Organic Chemistry

This organic chemistry video tutorial provides a basic introduction into the concept of diamagnetic anisotropy as it relates to H NMR spectroscopy. It explains why the chemical shift of molecules such as benzene and ethylene are much higher than for those of acetylene. It also uses 18-Annuelene as an example. It has to do with the induced magnetic field generated by the revolving pi electrons as a result of the external applied magnetic field of H NMR spectrometer.

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