Nitrogen donor complexes

Desmet, M., Raubenheimer, H.G. and Kruger, G.J. (1997) Synthesis and Characterization of Thienyl Oligomeric, Carbene, and Nitrogen-Donor Complexes of Gold(I). Organometallics, 16(15), 3324-3332. 

Amido ketiminato complexes, with bis-Cp Ti, 4, 579 Amido nitrogen-donor complexes, with Zr(IV) and Hf(IV),... 

Bis(adamantylimido) compounds, with monomeric chromium(VI) complexes, 5, 348 Bis(alkene) complexes conjugated, Rh complexes, 7, 214 mononuclear Ru and Os compounds, 6, 401 -02 in Ru and Os half-sandwich rj6-arenes, 6, 538 with tungsten carbonyls and isocyanides, 5, 685 Bis(u-alkenylcyclopentadienyl) complexes, with Ti(II), 4, 254 Bis(alkoxide) nitrogen-donor complexes, with Zr(IV), 4, 805 Bis(alkoxide) titanium alkynes, in cross-coupling, 4, 276 Bis(alkoxo) complexes, with bis-Cp Ti(IV), 4, 588 Bis[alkoxy(alkylamino)carbene]gold complexes, preparation, 2, 288... 

We have already alluded to the diversity of oxidation states, the dominance of oxo chemistry and the cluster carbonyls. Brief mention should be made too of the tendency of osmium (shared also by ruthenium and, to some extent, rhodium and iridium) to form polymeric species, often with oxo, nitrido or carboxylato bridges. Although it does have some activity in homogeneous catalysis (e.g. of m-hydroxylation, hydroxyamination or animation of alkenes, see p. 558, and occasionally for isomerization or hydrogenation of alkenes, see p. 571), osmium complexes are perhaps too substitution-inert for homogeneous catalysis to become a major feature of the chemistry of the element. The spectroscopic properties of some of the substituted heterocyclic nitrogen-donor complexes may yet make osmium an important element for photodissociation energy research. 

There are relatively few of these as with many of the sulfur-nitrogen donor complexes, little more than the stoichiometries is known. 

The nitrogen-donor complexes of gold(lll) are usually formed by the displacement of chloride in H[AuCLi] by nitrogen-donor ligands. The complex [Au(NH3)4](N03)3, for example, is obtained by bubbling gaseous ammonia into an aqueous solution of H[AuCL(] and ammoninm nitrate. 

Nitrogen-donor complexes of metal carbonyls, 10, 115-186 Nitrosyl complexes, 7, 211-236 Nitrosyl metal carbonyls, 7, 216-222 8, 21-22, 223... 

---