Novel supramolecular compounds based on Cucurbit[6]uril, 1,8-diaminooctane and octahedral thiohydroxo anions with cluster core [Re6S8]

Supramolecular compounds {C8N2H22@Cuc[6]}{Re6S8(H2O)2(OH)4}·18H2O (1), and K2{C8N2H22@Cuc[6]}{Re6S8(OH)6}·14H2O (2) were obtained by crystallization from aqueous solutions that contained the macrocyclic cavitand cucurbit[6]uril (C36H36N24O12), 1,8-diaminooctane and the cluster thiohydroxo complex [Re6S8(OH)6]4−. The resultant composition of the formed compounds depends on the experiment technique. According to the X-ray diffraction analysis, 1,8-diaminooctane molecules are encapsulated within the cavity of the cucurbit[6]uril molecules in such a way that the aminogroups are above and below the plane of the cavitand. The 1,8-diaminooctane molecules formed hydrogen bonds with the cavitand and the cluster thiohydroxo complexes to give chains.

Graphical abstractTwo supramolecular compounds {C8N2H22@Cuc[6]}{Re6S8(H2O)2(OH)4}·18H2O (1), and K2{C8N2H22@Cuc[6]}{Re6S8(OH)6}·14H2O (2) were obtained and crystallographically characterized. In their structure 1,8-diaminooctane molecules are encapsulated within the cavity of cucurbit[6]uril molecules. The 1,8-diaminooctane molecules form hydrogen bonds with the cavitand and the cluster thiohydroxo complexes to give chains.Figure optionsDownload full-size imageDownload as PowerPoint slide