Investigation of the zinc(II)–benzoate–2-pyridinealdoxime reaction system

摘要: The employment of pyridine-2-carbaldehyde oxime (paoH) in zinc(II) benzoate chemistry, the absence or presence azide ions, is described. syntheses, crystal structures and spectroscopic characterization are reported for complexes [Zn(O2CPh)2(paoH)2] (1), [Zn12(OH)4(O2CPh)16(pao)4] (2) [Zn4(OH)2(pao)4(N3)2] (3). ZnII centre octahedral 1 coordinated by two monodentate PhCO2− groups N,N′-chelating paoH ligands. metallic skeleton 2 describes a tetrahedron encapsulated distorted cube. {Zn12(μ-OH)4(μ3-ΟR)4}16+ core cluster can be conveniently described as consisting central {Zn4(μ3-ΟR)4}4+ cubane subunit (RO− = pao−) linked to four {Zn2(μ-OH)}3+ subunits via OH− group each latter, which becomes μ3. molecule 3 has an inverse 12-metallacrown-4 topology. Two triply bridging hydroxido accommodated into metallacrown ring. Each pao− ligand adopts η1 : η1 : η1 : μ coordination mode, chelating one atom ZnII2 pair. Complexes display photoluminescence with maxima at ∼355 nm ∼375 nm, upon maximum excitation 314 nm; origin discussed.