Anisotropy of magnetic susceptibility

Table 70 Calculated magnetic parameters of thiophenes magnetic susceptibility Xisol anisotropy of magnetic susceptibility Xanisoi the susceptibility component perpendicular to the ring plane, XzzI exaltation of the three parameters, A, Axamso. and Axzz, and nuclear-independent magnetic shift calculated at ring centers (NICS) and 1 A above the ring centers (NICS(1)) in ppm...

The different factors contributing to the chemical shifts of arenium ion protons are important enough to be studied more closely. As noted above C. MacLean and E. Mackor believed the anisotropy of magnetic susceptibility for the protonated benzene ring to be comparable to that of usual unsaturated systems. An attempt was made to verify experimentally this assumption by the protonation of 2,4,6,2, ... 

The above data, therefore, make it possible to conclude that the contribution of anisotropy of magnetic susceptibility to the shielding of the protons over tte benzene ring changes comparatively little upon the protonation of this ring. ... 

AMS 1) Accelerator mass spectrometry. 2) Anisotropy of magnetic susceptibility. 

Anisotropy of magnetic susceptibility (AMS) Measurements of magnetic susceptibility measured along different planes of a sample a measure of preferred magnetic orientation. 

A similar phenomenon occurs with magnetic fields and is related to the anisotropy of magnetic susceptibility. 

Table 13.2 Magnetic susceptibilities anisotropies of magnetic susceptibilities A/ (10 mol ), magnetic susceptibilities calculated from local increments and magnetic...

Parameter S2 can be found from the anisotropy of magnetic susceptibility, optical dichroism and birefringence, NMR, etc. The determination of higher order parameters requires for more sophisticated techniques. For instance, S4 can be found from Raman light scattering [15], luminescence or other two-wave interaction optical experiments. Data on 5e, Sg are not available at present. In some cases, the X-ray scattering can even provide/(1 ) as a whole but with limited accuracy. 

B. Criteria for Aromaticity Involvino Anisotropy of Magnetic Susceptibility and Magn ic Exaltation... 

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