Monopotassium monosodium hexa­hydrogen α-hexa­molybdoplatinate(IV) undeca­hydrate

摘要

The title compound, KNa[H6PtMo6O24]·11H2O, contains a discrete hexa­molybdoplatinate(IV) [H6PtMo6O24]²⁻ poly­anion (1 symmetry), which has the highest level of protonation. Five O atoms of the central PtO6 octa­hedron (μ3-atoms, Oc) and one O atom of an outer edge-sharing MoO6 octa­hedron (O bridging μ2-atom, Ob) are protonated. The polyanions are connected by almost linear O—H⋯O hydrogen bonds between protonated and unprotonated Ob atoms. Further consolidation of the crystal structure is accomplished by extensive O—H⋯O hydrogen bonding involving the uncoordinated water mol­ecules. The two independent K⁺ cations are equally disordered about a twofold rotation axis.