Nitrogen-containing ligands azide

Coordinated azide ion will undergo a number of reactions which involve attack at the azide ligand. A number of examples are summarized in Scheme 9.1172-1175 The azide ligand is photochemically dissociated from bis azide complexes. Irradiation of Pt(CN)4(N3) gives Pt(CN)4 and the azide radical (equation 366),1176 whereas with Pt(N3)2(PPh3)2 the nitrogen-containing product is believed to be N6 (equation 367).1177... 

Complex supramolecular architectures have been established for dimethyl-thallium(III) derivatives of polyfunctional nitrogen ligands, e.g. the cyanide, the azide, the cyanate, the thiocyanate [177], the dicyanamide, and the tricyanomethide [178], The cyanide, Me2TlCN, 53, contains layers of nearly coplanar CN groups... 

Formation of an enantiomerically pure, azide or amine containing, five or six membered ring by a pallidium catalyzed desymmetrization using a nitrogen nucleophile, where the palladium complex is derived from a chiral ligand and 7r-allylpalladium chloride ... 

In coordination chemistry, architectures containing the triazole heterocycle have been developed as monodentate and polydentate nitrogen ligands. Special attention has been given to (2-pyridyl)- and more flexible (2-picolyl)-l,2,3-triazoles. Thus, a hbrary of selected 1,4-disubstituted 1,2,3-triazoles differently functionahzed with pyridine, pyrimidine, and pyrazine have been synthesized by the reaction of aryl, heteroaryl, and heteroarylmethyl azides with alkynes. Three different copper(l) sources, that is, CuSO /sodium ascorbate, CuBrlPPhglg, and (CuOTf)2 CgHg, were used to promote the reactions [89]. 

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