Polynuclear magnetic susceptibility

On the general theory of magnetic susceptibilities of polynuclear transition metal compounds. J. S. Griffith, Struct. Bonding (Berlin), 1972,10, 87-126 (43). 

Griffith JS (1972) On the General Theory of Magnetic Susceptibilities of Polynuclear Transitionmetal Compounds. 10 87-126 Grisham CM, see Mildvan AS (1974) 20 1-21... 

J.S. Griffith On the General Theory of Magnetic Susceptibilities of Polynuclear Transition-metal Compounds. 

The IR, UV, ESR, single-crystal X-ray diffraction, and magnetic susceptibilities of [Cu(NCS)2(dmtp)2]2, Cu(NCS)2(dmtp)2 H20, the mononuclear complexes, bis(thiocyanato-A0bis(6-methyl-l,2,4-triazolo[l,5-a]pyrimidine-JV-3)copper(II), and the polynuclear pseudo-layered complexes, bis (thiocyanato-A)bis(5-methyl-l,2,4-triazolo[l,5-a]pyrimidine-iV-3) copper(II) were reported (84IC2803 89POL2313). 

At the end of this section on the relationship between the electronic properties and the stereochemistry of complexes of the copper(II) ion, it is worth summarizing the most useful physical techniques which offer a criterion for the presence of a polynuclear copper(II) complex rather than a mononuclear complex. These are (i) magnetic susceptibility measurements down to near absolute zero, for the determination of O or / values (ii) ESR spectra of magnetically dilute systems, in the solid state or in solution, to obtain hyperfine data and (iii) cyclic voltammetry to show evidence for a one-step reduction process in a Cu2 species. 

This expression is sufficient in the simplified simulation of magnetic susceptibility in polynuclear coordination compounds, where the case of very weakly interacting centers occurs. A non-trivial inquire is whether the HDVV is literaly valid for strongly bonded system—the present discussion having as implicit goal the corresponding answer. 

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