Self-assembly of hydrogen-bonded supramolecular structures based on hexafluorosilicate anion

Add time:07/29/2019    Source:sciencedirect.com

Interesting hydrogen-bonded supramolecular patterns have been achieved by hexafluorosilicate anion in the crystal structures of bis(thiabendazole) hexafluorosilicate dihydrate 1 and bis(pyrimethamine) hexafluorosilicate 2. In compound 1, the nitrogen atom of the benzimidazole ring rather than that of the thiazole ring is protonated. Water molecule is hydrogen-bonded with SiF62− anion through O–H⋯F hydrogen bonds to form a twelve membered cyclic hydrogen-bonded cluster. This cluster is self-organized to form a supramolecular chain. In the crystal structure of compound 2, the asymmetric unit contains two crystallographically independent protonated pyrimethamine (PMN) cations and a hexafluorosilicate SiF62− anion. The combination N–H⋯F and N–H⋯N hydrogen bonds results in the formation of complementary DADA (D and A represent donor and acceptor, respectively) array motif. It confirms that DADA array motif is a robust synthon in the crystal structures of diaminopyrimidine salts.

We also recommend Trading Suppliers and Manufacturers of SILVER HEXAFLUOROSILICATE (cas 12021-64-6). Pls Click Website Link as below: cas 12021-64-6 suppliers

Prev:Preparation, structure and properties of pyridinium/bipyridinium hexafluorosilicates
Next:Cytotoxicity of ammonium hexafluorosilicate on human gingival fibroblasts)