Separation sulfur donor ligands

Iron-iron bonds exist in carbonyl and nitrosyl derivatives, but these are not considered in this section. Properties consistent with Fe-Fe interactions in other systems are dominated by sulfur donor ligands. The presence of Fe-Fe bonds is not unambiguous, with sulfur bridges invariably accompanying short metal-metal separations. Synthetic routes to polynuclear iron-sulfur complexes are presented for completeness without implying the cluster bonding scheme. [Pg.120]

Properties and Uses of Nitrogen and Sulfur Donors Ligands in Actinide Separations... [Pg.130]

Musikas, C., G. LeMarois, R. Fitoussi and C. Cuillerdier, 1980, Properties and uses of nitrogen and sulfur donor ligands in actinide separations, in Actinide Separations, ACS Symposium Series, Vol. 117, eds J.D. Navratil and W.W. Schulz (American Chemical Society, Washington, DC) p. 131. [Pg.238]

Examples of the use of synthetic mixed donor macrocycles in heavy metal ion separations are found in the discrimination of silver from lead. A number of studies indicate that the inclusion of sulfur in macrocyclic sequestering agents shifts the discrimination to silver. An example of this is seen with (57) and (58). For the aza-oxa macrocycle (57) the log K is 5.9 for both silver and lead ions, while the thia-incorporated ligand (58) complexes silver more efficiently (log K = 9.9) compared to lead (log K = 5.7). ... [Pg.2432]

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