Unexpected guest-controlled formation of two-layered structure in supramolecular adduct of [W3S4(H2O)9]4+ and cucurbituril

A new supramolecular adduct {[W3S4(H2O)8Cl][(PyH⊂C36H36N24O12)]}Cl4·15.5H2O (1·15.5H2O) was obtained when pyridine was added to the reaction mixture of cucurbituril and [W3S4(H2O)9]4+ in 3 M HCl. X-ray crystal structure analysis of 1·15.5H2O revealed layered motive of the structure with two different types of cucurbituril molecules. A PyH+ molecule is encapsulated in the cavity of each of the cucurbituril molecule. Under vacuum it loses 13.5 H2O molecules and gives {[W3S4(H2O)8Cl][(PyH⊂C36H36N24O12)]}Cl4·2H2O (1·2H2O).