Mohan, Midhun; Essalhi, Mohamed; Zaye, Sarah; Rana, Love Karan; Maris, Thierry; Duong, Adam published an article in 2021. The article was titled 《Hydrogen Bond Patterns of Dipyridone and Bis(Hydroxypyridinium) Cations》, and you may find the article in ACS Omega.Application of 624-28-2 The information in the text is summarized as follows:
Dipyridonyl-substituted derivatives I,II,III ( 2,3,4, resp.) of benzene, pyridine, and pyrazine, resp., were synthesized to examine the ability of 2-pyridone and its protonated species to direct the self-assembly by hydrogen bonding. Structural anal. by single-crystal X-ray diffraction (SCXRD) of 2 and 4 in trifluoroacetic acid demonstrated that salts are formed as a result of the transfer of protons from the acid to the base (organic species) to generate a bis(hydroxypyridinium) dication. However, if no proton transfer takes place like in the case of crystals of 3 grown from DMSO/H2O, the self-assembly is mainly directed by the typical R22(8) hydrogen bond motif of 2-pyridone. These results indicate that the process of converting a neutral 2-pyridonyl group into a hydroxypyridinium cation makes structure prediction difficult. Consequently, examination of proton transfer and assembly of dipyridone and its protonated species are of interest. In combination with SCXRD, Hirshfeld surface anal. (HSA) was also used to have a better understanding on the nature of intermol. interactions within crystal structures of 2-4. The large number of F···H/H···F, H···O/O···H, H···H, and H···C/C···H contacts revealed by HSA indicates that hydrogen bonding and van der Waals interactions mainly contribute to crystal packing. In the part of experimental materials, we found many familiar compounds, such as 2,5-Dibromopyridine(cas: 624-28-2Application of 624-28-2)
2,5-Dibromopyridine(cas: 624-28-2) belongs to pyridine. Pyridines form stable salts with strong acids. Pyridine itself is often used to neutralize acid formed in a reaction and as a basic solvent. Application of 624-28-2