《Superstructural diversity in salt-cocrystals: higher-order hydrogen-bonded assemblies formed using U-shaped dications and with assistance of π–π stacking》 was published in Chemical Communications (Cambridge, United Kingdom) in 2020. These research results belong to Yelgaonkar, Shweta P.; Kiani, Daniyal; Baltrusaitis, Jonas; MacGillivray, Leonard R.. COA of Formula: C7H5N The article mentions the following:
Salt cocrystals with components that assemble by hydrogen bonds and aromatic anion-mol. stacks (π–π stacks) are reported. U-shaped bipyridines and an isocoumarin carboxylic acid self-assemble to form 5-, 6-, and 10-component aggregates with components in double and quadruple face-to-face stacks. DFT calculations support the π–π stacks to help stabilize the salt cocrystals. The experimental part of the paper was very detailed, including the reaction process of 4-Ethynylpyridine(cas: 2510-22-7COA of Formula: C7H5N)
4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. Pyridine’s structure is isoelectronic with that of benzene, but its properties are quite different. Pyridine is completely miscible with water, whereas benzene is only slightly soluble. Like all hydrocarbons, benzene is neutral (in the acid–base sense), but because of its nitrogen atom, pyridine is a weak base.COA of Formula: C7H5N