A Spherical Potassium-Capped Vanadium Methylphosphonate as Another ε-Keggin Fragment, [H6KV12O27(VO4)(PO3CH3)3]5−
An [H3KV12O27(AsO4)4]6−-isostructural e-Keggin fragment anion, [H6KV12O27(VO4)(PO3CH3)3]5−, was photochemically prepared. This K+-capped anion is formally built of nine VIVO6 octahedra, three PO3C tetrahedra, and four VVO4 tetrahedra, one of the latter being a central VO43− group. The capping K+ cation lies on the C3 axis and links two adjacent anion, to form a linear chain of the anions along c-axis.