A new type of supramolecular assembly consisting of crown ether complex cation and a polyoxometalate anion: Synthesis and crystal structure of [Na(C20H24O6)(CH3CN)2]2[Mo6O19] · 4CH3CN

A novel hybrid compound [Na(C20H24O6)(CH3CN)2]2[Mo6O19] · 4CH3CN (1) displays three-dimensional hydrogen bonding network consisting of one-dimensional sandglass channels that are filled by guest solvent molecules.