Ruthenium ammines

Table 19.1 Calculated values of k, rd and for various ammine ruthenium complexes as a water oxidation catalyst incorporated into Nation membrane...

Some accounts on the redox-induced switching of hyperpolarisabilities utilised penta-ammine ruthenium complexes bearing substituted 4,4 -bipyri-dinium coligands. The intense bipyridinium Ru LMCT band at 580 to 636 nm bleaches upon reduction of the metal centre, thus switching off their quadratic NLO response. The oxidation of the ferrocene donor in an ethenyl-linked ferrocene-nitrothiophene dyad likewise results in a decrease of the quadratic NLO response by about one order in magnitude. Oxidation-state-dependent quadratic NLO performance has also been noted by Lapinte and coworkers who compared the complexes Cp (dppe)Fe—C=CPh, Cp (dppe)Fe-C=C- 2(p-C6H4-l,4), Cp (dppe)Fe-C=C- 2(g-C6H4-l,3),... 

Because it is affected by the interaction of a redox molecule and a matrix, charge transfer can involve both physical diffusion and charge hopping. A typical example is an oxo-bridged trinuclear ammine ruthenium complex called Ru-red 6. 

NH3, Ammines, ruthenium (III), 26 66, 67 NIr04P2C4oH3o, Iridate(l—), tetracar-bonyl-, M-nitrido-bis (triphenylphos-phorus)(l -I-), 28 214... 

The properties and preparation of a number of ammine-ruthenium complexes of sulphur substrates have been reported. Electrochemical oxidation of [RuCNHslg-... 

CftHj9N5O10RUS2 2 H2O, Penta-ammine-ruthenium(ll) fumaric acid di-thionate dihydrate, 45B, 910... 

Historically, the most important ruthenium(II) ammine species is [Ru(NH3)5N2]2+, the first stable dinitrogen complex to be isolated (1965). It was initially obtained by refluxing RuC13 in hydrazine solution (but many... 

Many of the ammine complexes are osmium(III) compounds the +2 state is less stable than with ruthenium, as expected, and osmium(II) compounds... 

Ruthenium aqua ions — their comparison to ruthenium ammines. P. Bernhard, H. Lehmann and A. Ludi, Comments Inorg. Chem., 1983, 2, 145-156 (22),... 

Substitution reactions of ruthenium ammines. H. Taube, Comments Inorg. Chem., 1981, 1, 17-31... 

Reversible reactions. Consider the elementary reaction A + B P + Q with an equilibrium constant of unity. Such a situation pertains to certain reactions of ruthenium-ammine complexes.14 These authors give an integrated equation applicable when P and Q are absent initially ... 

The overall volume changes could be accounted for in terms of electro-striction effects centered around the ammine ligands on the ruthenium center. A number of possible explanations in terms of the effect of pressure on electronic and nuclear factors were offered to account for the asymmetrical nature of the volume profile (159). 

The absorbance changes shown below occur for the reaction of the radicals with penta-ammine(histidine-33)ruthenium(III) ferricytochrome c, PFe "-Ru" (see (5.84)). The final product is PFe Ru ". Absorbance increases at 550 nm are largely as a result of the step PFe " PFe . Interpret the changes (particularly the relative absorbances associated with the very fast and slower absorbances). 

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