Self-assembled half-sandwich Ir, Rh-based organometallic molecular boxes for reversible trapping of halocarbon molecules was written by Han, Ying-Feng;Fei, Yue;Jin, Guo-Xin. And the article was included in Dalton Transactions in 2010.Category: pyridine-derivatives This article mentions the following:
Reactions of [Cp*MCl(μ-Cl)]2 (M = Ir or Rh) with 6,11-dihydroxy-5,12-naphthacenedione (H2DHNA) in the presence of a base, gave the corresponding binuclear complexes [Cp*2M2(μ-DHNA)Cl2] (M = Ir (1a); M = Rh (1b)), resp. Treatment of 1a or 1b with bidentate ligands (L) such as pyrazine, 4,4′-dipyridine (bpy), E-1,2-bis(4-pyridyl)ethene (bpe) or 2,5-bis(4-pyridyl)-1,3,5-oxadiazole (bpo) in the presence of AgOTf (OTf = CF3SO3) in MeOH, gave the corresponding tetranuclear complexes, [Cp*4M4(μ-DHNA)2(μ-L)2](OTf)4 (M = Ir, L = pyrazine (3a), bpy (4a), bpe (5a), bpo (6a); M = Rh , L = pyrazine (3b), bpy (4b), bpe (5b), bpo (6b)), resp. X-ray analyses of 3a, 3b, 4a, 4b, 5a and 5b revealed that each of the half-sandwich metal centers was connected by DHNA and bidentate bridging ligands to construct a rectangular cavity with different dimensions, and strong π-π interactions between independent mols. to form rectangular channels in the solid-state. Complexes 3a and 3b based on H2DHNA and pyrazine spacing ligands exhibit selective and reversible small organic mols. adsorption properties. Intercalated supramol. arrays were obtained by introducing Cl2C:CCl2 templates into the middle of the 1-dimensional lines of 3b. The 2-dimensional framework was stabilized due to weak C-H···Cl interactions and the displaced face-to-face π···π interactions between the planes of the monomeric complexes. The hollow cavities in the 2-dimensional frameworks still exhibit selective and reversible CH2Cl2 adsorption properties. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7Category: pyridine-derivatives).
2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Category: pyridine-derivatives