Hexa­kis­{[1-(dimethyl­amino)­propyl­idene]oxidanium} bis­(dodeca­molybdo­phosphate) N,N-dimethyl­propionamide penta­solvate

In the asymmetric unit of the title salt, (C₅H₁₂NO)₆[PMo₁₂O₄₀]₂·5C₅H₁₁NO, there are two independent α-Keggin-type [PMo₁₂O₄₀]³⁻ polyoxidoanions, which show characteristic features with respect to bond lengths and angles. One of the [CH₃CH₂C(=OH)N(CH₃)₂]⁺ cations is hydrogen bonded to the neighboring polyoxidoanion through a C=O—H...O_bridge hydrogen bond. The organic mol­ecules and the remaining organic cations form [(C₅H₁₁NO)₂H]⁺ mol­ecule–cation pairs, two of which lie about inversion centers, through O—H...O hydrogen bonds.