The Oxovanadium–Organoarsonate System: [2CH3OH ⊂ V12O14(OH)4(PhAsO3)10]4− and [2H2O ⊂ V12O12(OH)2(H2O)2(PhAsO3)10− (PhAsO3H)4]2−, Clusters with Nanometer Dimensions and Cavities for Neutral Molecules

Neutral molecules are encapsulated in the cluster anions in the title, which were produced by solvothermal reactions of [nBu4N]3[H3V10O28] and PhAsO3H2 in CH3OH/H2O (99:1) with and without Et4NCl. The structures are shown schematically below.