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  1. Magnetic anisotropy in NMR can be described as follows12:
    • The resonance frequency of a nuclear spin depends on the strength of the magnetic field at the nucleus, which can be modified by isotropic and anisotropic interactions.
    • The effect of the pseudocontact term arises from magnetic anisotropy of the paramagnetic center, which creates a magnetic field that supplements that of the instrument's magnet.
    • The magnetic field exerts its effect with both angular and a 1/r 3 geometric dependences.
    Learn more:
    The effect of the pseudocontact term arises from magnetic anisotropy of the paramagnetic center (reflected in g-anisotropy in the EPR spectrum). This anisotropy creates a magnetic field which supplements that of the instrument's magnet. The magnetic field exerts its effect with both angular and a 1/r 3 geometric dependences.
    en.wikipedia.org/wiki/Paramagnetic_nuclear_magn…
    The resonance frequency of a nuclear spin depends on the strength of the magnetic field at the nucleus, which can be modified by isotropic (e.g. chemical shift, isotropic J- coupling) and anisotropic interactions (e.g. chemical shift anisotropy, dipolar interactions).
    en.wikipedia.org/wiki/Solid-state_nuclear_magnetic…
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