Contributions to the paramagnetic component

Some calculated contributions to the paramagnetic component of the nitrogen screening... 

Excitations which contribute to the paramagnetic term must be magnetic dipole allowed. Thus the AE used in the approximate theory usually corresponds to the lowest energy transition of this type (in terms of one-electron excitations, n- n, n-KT, n a, <7 r, etc.) or else some effective average over a few of them, the most important involving orbitals centered on the nucleus of interest. Such transitions have, e.g., Px Py, d y or corresponding/ /components which involve a... 

It is useful to consider typical values of different contributions to the magnetic susceptibility. One important component is the Curie susceptibility arising from isolated (i.e., noninteracting) paramagnetic ions with g-factor g and spin S which is given by ... 

In paramagnetic systems, there can be non-negligible contributions to the CSA of NH nuclei from their dipolar coupling with the time-averaged magnetic moment of the electron (see Section 3.6). As a consequence, it cannot be predicted a priori which will be the sharpest component for each NH peak in a heterocorrelated experiment, and TROSY is less useful, unless four different TROSY spectra are acquired by selecting a different component each time [27]. 

Multinuclear NMR spectroscopy makes it possible to obtain data on electron density distribution in clathrochelate molecules and their structure. The resonance on the ° Co nucleus provides information on the spatial and electronic structure of the coordination polyhedron of an encapsulated cobalt(III) ions. A dominant contribution to the chemical shift is made by the paramagnetic component Bo, which is linearly determinated by d-d transition energy =... 

The resulting gauge independent expressions for the local diamagnetic and paramagnetic contributions to the screening of nucleus A, where a and P are labels for the cartesian components x,y and z, are given by ... 

The interaction of the unpaired electron on the paramagnetic metal ion with that of the nuclear spin is analogous to the nuclear-nuclear spin complex commonly observed in nuclear mimetic resonance spectroscopy. Thus, the electron-spin relaxation (Te) affects the nuclear-spin relaxation-rates (T, and T2). Eqs. 3 and 4, describing the contribution to the nuclear relaxation rate from the component spin on the paramagnetic species were derived by Solomon and Bloembergen ... 

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