Synthesis and Crystal Structure of the Lithium(i) Aquacomplex With Macrocyclic Cavitand Cucurbit[6]uril

A supramolecular adduct [[Li(H2O)2]2((H2O)2@C36H36N24O12)](NO3)2·6H2O is prepared by heating an aqueous solution containing lithium nitrate and cucurbit[6]uril. According to single crystal XRD data, metal is bonded with the macrocycle in the complex via the bidentate coordination of oxygen atoms of cucurbit[6]uril portals to lithium(I) cations, which results in the formation of a molecular complex. In the crystal, [[Li(H2O)2]2(C36H36N24O12)]2+ cations are linked with each other by a system of hydrogen bonds into supramolecular chains. The compound is characterized by a set of physicochemical methods: IR spectroscopy, thermogravimetric and elemental analysis; luminescence spectra are also measured.