Crystal structures of two substituted 2,5-diaryl-1,3,4-oxadiazoles was written by Stockhause, S.;Wickleder, M. S.;Meyer, G.;Orgzall, I.;Schulz, B.. And the article was included in Journal of Molecular Structure in 2001.Formula: C12H8N4O This article mentions the following:
The crystal structures of 2,5-di(4-pyridyl)-1,3,4-oxadiazole (I) and 2-(4-cyanophenyl)-5-(4-dimethylaminophenyl)-1,3,4-oxadiazole (II) were determined from single crystal data. I is monoclinic, space group C2/c, a 5.3129(9), b 12.142(3), c 16.771(3) Å, β 93.41(2)°, Rall = 0.0774. II is triclinic, space group P1̅, a 7.3908(12), b 8.7992(15), c 12.036(2) Å, α 77.04(2), β 89.29(2), γ 87.58(2)°, Rall = 0.0552. At. coordinates are given. In both structures the formation of stacks of the almost planar mols. is observed as known for other oxadiazoles. These compounds exhibit differences to other substituted 2,5-diaryl-1,3,4-oxadiazoles in the crystalline structure. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7Formula: C12H8N4O).
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. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Formula: C12H8N4O