NMR stands for the acronym "nuclear magnetic resonance" of nuclear magnetic resonance. NMR spectroscopy is a special form of spectroscopy for the structural elucidation of organic and metalorganic compounds. For these compounds the properties of magnetic resonance are used. By introducing a substance into a magnetic field, the magnetizable atomic nuclei contained in the molecules align themselves according to their magnetic moment. The level of the resonance frequency depends on the type of nucleus and the magnetic strength.