Salts of 5,5′‐azotetrazolate with alkali metal, alkaline earth metal and several trivalent cations were synthesized as potential initial explosives. The synthesis in water yields hydrates of these salts that were studied by NMR and vibrational spectroscopy as well as X‐ray diffraction. Their thermal properties were studied by DSC and TG.

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The reaction of [(arene)RuCl2]2 (arene = C6H6, cymene, C6H3Et3, or C6Me6) or [Cp*RhCl2]2 with 3-hydroxy-2-pyridone in the presence of Cs2CO3 gives trinuclear metallamacrocyclic complexes. The self-assembly process was shown to be completely diastereoselective, and a racemic mixture of complexes with M(R)M(R)M(R) or MsMsMs (M=Ru, Rh) configuration was obtained. Plausible mononuclear intermediates of the formula [(arene)RuCl(C5H4NO2)] (arene = cymene, C6Me6) have been isolated and characterized. A structurally related trimer was synthesized by using [(cymene)RuCl2]2 and 3-acetamido-2-pyridone instead of 3-hydroxy-2-pyridone. The macrocycles were shown to be highly potent ionophores for Na+ and/or Li+ with negligible affinities for the larger cation K+. The selectivities of the receptors depend on the pi-ligand present: whereas the (C6H6)Ru- and (cymene)Ru complexes bind both Li+ and Na+, the (C6Me6)Ru-, (C6H3Et3)Ru-, and Cp*Rh complexes bind exclusively Li+. For all receptors, the presence of alkali metal ions can be detected electrochemically: the peak potential is shifted by > 300 mV toward anionic potential upon binding. This behavior was utilized to detect Li+ and Na+ colorimetrically. Single crystal X-ray analyses have been carried out on eight complexes, four of which are bound to an alkali metal halide ion pair. Structural parameters, which affect the affinity and selectivity are discussed. A computational study on [[MX][12]crown-3] complexes (M =Li, Na; X=Cl, Br, I) was performed in order to compare relevant bond lengths and angles of the energy-minimized structures with those of the organometallic receptors.

The mode of co-ordination of the multidentate ligand 2,2Ј-dimethyl-4,4Ј-bipyrimidine (L) was found to depend on the metal ion, the crystallization conditions, the metal-to-ligand ratio, and the anion. With nickel a chelating co-ordination through the endo-dentate nitrogen donor set is observed in the molecular complex [NiCl 2 (L)(H 2 O)]ؒCH 3 NO 2 , derived from hot CH 3 NO 2 . With Cu(NO 3 ) 2 and CuI-CH 3 CN one-and two-dimensional (1-D and 2-D) co-ordination polymers of formula ∞

A new synthetic route for the synthesis of 5,5Ј-diamino-2,2-NMR including 113 Cd-NMR, IR, and for the iron complex 57 Fe-Mößbauer spectroscopy. The structure of eight of the bipyridine (5) based on the coupling of 2-chloro-5aminopyridine in the presence of NiCl 2 × 6 H 2 O/PPh 3 /Zn in compounds was elucidated by X-ray crystallography. All of these metal complexes show a bipyridine-metal dimethylformamide is described. The reactions of the potentially ambidentate ligand 5 with salts of the transition coordination. The amino functionality was never involved in metal coordination. The intermolecular arrangement is metals Mn, Fe, Ni, Cu, Zn, Ag, and Cd gave a variety of 13 metal-ligand complexes depending on the anion, the dictated by hydrogen bonding from the amino functionality and by π-π stacking of the bipyridine rings. crystallization conditions and the metal-to-ligand ratio. The complexes obtained were characterized by thermal analyses,