Ruthenium nitrogen donor ligands

Let us now examine sample sets of data. We shall consider two reactions, the formation of a biradical1 [Eq. (7-10)] and an electron transfer reaction between two ruthenium complexes [Eq. (7-11)], in which LN represent nitrogen-donor ligands specified in the original reference.2 The chemical equations are... 

Since the early 1980s rich thermal and photochemical redox chemistries of Os =N species containing nonlabile oxidation-resistant nitrogen donor ligands have emerged. However, there are only a few examples of ruthenium(VI) nitrido complexes of this type, and their redox chemistry is largely unexplored. 

Extensive work on cis- and trans-d o o complexes of ruthenium(VI) and osmium(VI) containing nonlabile, oxidation-resistant nitrogen donor ligands has been reported. 

Ruthenium(IV), d, forms a more limited number of complexes involving mainly the halides (except the iodide), oxalate, and sulfate, together with r-acceptor nitrogen donor ligands. RUO2 is used as a catalyst and as an electrode material. 

Other N-donor ligands. The reaction between [Ru(NH3)j(H20)] and hydra-zoic acid has been shown to give rapidly one mole of nitrogen and 0.5 moles of both [Ru(NH3)5] and [Ru(NH3)5(H20)] . The proposed mechanism [equation (4)-( 7)] involves Ru—N bond formation prior to N—cleavage in the azide group. In contrast to similar ruthenium(m) nitrenes the species... 

Group V Donors. N-donor ligands. An unusual molecular nitrogen complex of ruthenium(iii) with formula [Ru(NH3)4(N2)(H20)](N03)3 has been isolated from the nitric acid oxidation of the known [Ru(NH3)4(N2)(H20)]. K the oxidation is carried out by iodine, a compound analysing as [Ru(N2)(NH3)4-I(NH3)4Ru(N2)]l4 is obtained which is believed to contain both Ru" and Ru ". As expected the ruthenium(iii) dinitrogen complexes are less stable in solution than corresponding ruthenium(ii) compounds. 

The complex [Ru(EDTA)(H20)] undergoes substitution reactions with several ligands, replacing the water molecule with the ligand. In all cases the ruthenium stays in the +3 oxidation state and the ligands use a nitrogen donor atom to bind to the metaL... 

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