Du, Miao et al. published their research in Crystal Growth & Design in 2002 | CAS: 15420-02-7

2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds. 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.Reference of 15420-02-7

{[Cd(bpo)(SCN)2]·CH3CN}n: A Novel Three-Dimensional (3D) Noninterpenetrated Channel-Like Open Framework with Porous Properties was written by Du, Miao;Chen, Shen-Tan;Bu, Xian-He. And the article was included in Crystal Growth & Design in 2002.Reference of 15420-02-7 This article mentions the following:

Reaction of CdCl2·0.5H2O with 2,5-bis(4-pyridyl)-1,3,4-oxodiazole (bpo) and NH4SCN in a 1:1:2 molar ratio under MeCN-H2O medium afforded a novel neutral three-dimensional (3D) coordination polymer {[Cd(bpo)(SCN)2]·MeCN}n (1) [monoclinic, space group P21/c, a 7.680(2), b 10.029(3), c 25.786(7) Å, β 93.779(5)°, Z = 4]. The crystal structure reveals that 1 has a 3-dimensional noninterpenetrating open framework with guest MeCN mols. in the cavities, in which the CdII centers (with CdN4S2 octahedral geometry) are bridged by the bpo mols. and SCN– groups. It is interesting that the two-dimensional sheet in this 3-dimensional network consists of 16-membered [Cd4(μ-SCN-N,S)4] rings, and the bpo mols. extend these layers to a 3-dimensional structure, which is further stabilized by C-H…N H-bonding and strong π-π-stacking interactions. TGA and x-ray powder diffraction technique measurements illustrate that the framework of 1 is retained upon removal of the uncoordinated guest MeCN mols., indicating that 1 might be used to generate microporous material. In the experiment, the researchers used many compounds, for example, 2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7Reference of 15420-02-7).

2,5-Di(pyridin-4-yl)-1,3,4-oxadiazole (cas: 15420-02-7) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds. 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.Reference of 15420-02-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem