Gram susceptibility

An additional, independent estimate of the concentration of paramagnetic superoxo and diamagnetic hydroperoxo-/peroxo-titanium species was made from magnetic susceptibility measurements using a Lewis coil force magnetometer (52). The gram-susceptibility of Ti in TS-1 + H2C>2 was estimated to be 5.5 X 10-6 emu/g, which corresponds to an effective magnetic moment of... 

Fig. 1. Gram susceptibility of two samples of XefPtF ) compared with XeF+PtFr.

A quantity q = %, where q is the density, is the gram susceptibility, but in magnetochemistry the most useful quantities are and the... 

Gram Susceptibility (c.g.s.emu/gram) Gram Susceptibility (c.g.s.emu/gram)... 

When a substance is subjected to magnetic field H, and a magnetization I is induced. The ratio I/H is called the volume susceptibility k and can be measured by a number of techniques, including Gouy balance method, Faraday method and an nmr method. The volume susceptibility is related to the gram susceptibility c and the molar susceptibility cm. 

In these equations cl is the density in g cm-3 and M is the molecular weight. X is called the gram susceptibility and /m is called the molar susceptibility. When a value of is obtained from the measured volume susceptibility, k, it can be corrected for the diamagnetic contribution and for the TIP to give a corrected molar susceptibility, Xm"> which is the most useful quantity in drawing conclusions about electronic structure. 

The magnetic susceptibility per unit mass ( gram susceptibility ), Xgj is defined in terms of k as... 

Where the gram susceptibility Xg was reported rather than the molar susceptibility Xm, this data is included in column 5. For substances where the Curie-Wefe law was found applicable, fi-om Eq. (27) is presented in column 4 and 0p in column 5. According to common usage, these values shoidd be considered as determined on a purely empirical basis. Substances which were actually found to be antiferromagnetic, are characterized as such in column 5. However where, for paramagnetic compounds, authors deduce only from Eq. (27) and calculate frOm Eq. (24) at a particular temperature T, such values are included in column 4 and the temperature... 

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