Oxo-ruthenium complex

Table 8 Representative kinetic data for the oxidation of propan-2-ol by ruthenium oxo complexes.

Benzyl alcohol, oxidation, by ruthenium oxo complexes, 39 287-289 Benzylazide, NMR of, 4 263 Benzylidene diacetate, nitration of, 6 114 Berkelium... 

Schiff base ligands, 39 294-295 styrene oxidation by ruthenium oxo complexes, 39 290, 292... 

One of the most remarkable reactions performed by ruthenium-oxo complexes is the selective oxidation of aliphatic and cyclic ethers to the corresponding esters and lactones, respectively, with high yields under mild conditions.288,334 For example, tetrahydrofuran is oxidized by Ru04 to y-butyrolactone with nearly quantitative yields.334 A catalytic reaction can be carried out in the presence of excess hypochlorite or periodate.332,335... 

Representative Kinetic Data for the Oxidation of Benzyl Alcohol by Ruthenium Oxo Complexes... 

Ruthenium oxo complexes with N-heterocyclic ligands as organic oxidants 92CSR179. 

The systems described above all involve peroxometal species as the active oxidant. In contrast, ruthenium catalysts involve a ruthenium-oxo complex as the active oxidant [1]. Until recently, no Ru-catalysts were known that were able to activate H202 rather then to decompose it. However in 2005 Beller and co-workers recognized the potential of the Ru(terpyridine)(2,6-pyridinedicarboxylate) catalyst [63] for the epoxidation of olefins with H202 [64]. The result is a very efficient method for the epoxidation of a wide range of alkyl substituted or allylic alkenes using as little as 0.5 mol% Ru. In Fig. 4.26 details are given. Terminal... 

Jitsukawa, K., Shiozaki, H., Masuda, H. Epoxidation activities of mononuclear ruthenium-oxo complexes with a square planar 6,6 -bis(benzoylamino)-2,2 -bipyridine and axial ligands. Tetrahedron Lett. 2002, 43,1491-1494. 

Thus prepared layers have been further modified to develop electrocatalysts and sensors. Polypyridyl ruthenium-oxo complexes are of particular interest as efficient oxidants for a wide variety of organic molecules, including aromatic hydrocarbons, olefins, alcohols, and ketones. One such electrocatalyst was prepared by first electrografting bipyridine at an applied positive potential followed by treating the modified surface with [Ru tl2(DMSO)(terpyridine)] and then CFjSOjH/HjO [104]. Enhanced electrochemical activity has also been observed for the reduction of oxygen at anthraquinone-modified GC electrodes in 0.1 M KOH solution [105,... 

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