کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1314708 | 1499365 | 2012 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Self-assembly of hydrogen-bonded supramolecular structures based on hexafluorosilicate anion Self-assembly of hydrogen-bonded supramolecular structures based on hexafluorosilicate anion](/preview/png/1314708.png)
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.
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.Figure optionsDownload as PowerPoint slideHighlights
► Supramolecular structures based on hexafluorosilicate anion.
► Hydrogen-bonded motifs self-assembled into supramolecular architectures.
► The DADA array motif is a robust synthon.
► This result may be very useful for the design of novel functional materials.
Journal: Journal of Fluorine Chemistry - Volume 135, March 2012, Pages 38–44