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Description
At the end of this activity, students should be able to: – explain how atomic nuclei behave in an external magnetic field, depending upon whether they posses nuclear spin or not – explain why a magnetic field causes the energy levels of nuclei possessing nuclear spin to split – explain the nuclear absorption of electromagnetic radiation by nuclei placed in a magnetic field – describe the construction and operation of an NMR spectrometer and how an NMR spectrum is recorded – explain the term 'chemical shift' and discuss why hydrogen atoms in organic molecules may produce more than one NMR absorption signal – explain why TMS has been chosen as a standard in NMR spectroscopy – identify equivalent and non–equivalent 1H atoms in the molecule – predict the number of absorption signals in low–resolution proton NMR spectra, as well as their relative intensity.
