Syntheses, Crystal Structures, and Thermal Stability of Metal-Directed Co(II) and Cu(II) Coordination Assemblies with Mixed Ligands of 5-Methylisophthalic Acid and 2,5-Bis(4-Pyridyl)-1,3,4-Oxadiazole was written by Liu, Shang-Yuan;Chen, Jing;Li, Cheng-Peng. And the article was included in Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry in 2011.Category: pyridine-derivatives This article mentions the following:
Two mixed-ligand Co(II) and Cu(II) coordination complexes were prepared by using a similar hydrothermal method, from a bent dipyridyl building block 2,5-bis(4-pyridyl)-1,3,4-oxadiazole (4-bpo) and 5-methylisophthalic acid (H2i.p.-CH3). Complexes 1 and 2 show the distinct coordination structures, such as 1D polymeric ribbon and dinuclear paddle-wheel motif, resp. Furthermore, H-bonding interactions extend the coordination patterns into a 3D scaffold architecture for 1 and a 2D 2-fold entangled network of both polyrotaxane and polycatenane features for 2. The interesting structural architectures of such two complexes are mainly directed by the different coordination capability of metal ions, as well as the H-bonding interactions. 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. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals.Category: pyridine-derivatives