Add time:09/07/2019         Source:sciencedirect.com

Publisher SummaryThis chapter reviews the chemistry observed with Group 7 (Mn, Tc, and Re) poly(pyrazolyl)borate complexes. The redox flexibility of these transition metals and the variability of poly(pyrazolyl) borate ligands have resulted in a wide range of chemistry. Poly(pyrazolyl)borate ligands support numerous complexes involving Group 7 transition metals. The flexibility of these ligands has allowed access to a range of oxidation states and geometries as well as provided Mn, Tc, and Re complexes with a diversity of reactivity. As a result of these attractive features, poly(pyrazolyl)borate ligands support a diversity of complexes, including coordination to all elements of groups 1 through 13 as well as some lanthanides and actinides. Transition metal complexes containing imido ligands are of interest due to their possible role in olefin aziridinations, metal-mediated metathesis of multiple bonds, ammoxidation reactions, C–H activation sequences as well as catalytic hydroamination of C–C multiple bonds. In addition, the chapter discusses about Rhenium, Manganese, and Technetium chemistry with respect to high oxidation as well as low oxidation state complexes.

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