Iron ruthenium

Table 25.1 Some properties of the elements iron, ruthenium and osmium...

Table 25.2 Standard reduction potentials for iron, ruthenium and osmium in acidic aqueous solution...

Table 25.6 Halidas and oxohalldea Halides of iron, ruthenium and osnuum fmp/ C) 10B3... 

In the iron, ruthenium, and osmium derivatives, there are eases of r] re-switeh on thermolysis followed by the elimination of small ligands. Organo-ruthenium speeies eontaining pyrazol-l-ylborate or -methane ligands with bulky substituents often have uneoordinated pyrazol-l-yl moieties and agostie R—B(C) - - - M interaetion. The latter sometimes influenees the properties of the jj -eoordinated speeies as well. 

Pauling, L. Evidence from Bond Lengths and Bond Angles for Enneacovalence of Cobalt, Rhodium, Iridium, Iron, Ruthenium, and Osmium in Compounds with Elements of Medium Electronegativity Proc. Natl. Acad. Sci. (USA) 1984, 81, 1918-1921. 

In the previous sections we have dealt mainly with the catalytic activity of pure substances such as metallic iron, ruthenium, copper, platinum, etc. Real catalyst, however, are often much more complex materials that have been optimized by adding remote amounts of other elements that may have a profound impact on the overall reactivity or selectivity of the catalyst. Here we shall deal with a few prominent examples of such effects. 

Kramer, J., Redel, E., Thomann, R. and Janiak, C. (2008) Use of ionic liquids for the synthesis of iron, ruthenium, and osmium nanopartides from their metal carbonyl precursors. Organometallics,... 

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