Tetra­kis(di­propyl­ammonium) tetra­kis(oxa­lato-κ(2) O (1),O (2))stannate(IV) mono­hydrate: a complex with an eight-coordinate Sn(IV) atom

In the title salt, [(CH(3)CH(2)CH(2))(2)NH(2)](4)[Sn(C(2)O(4))(4)]·H(2)O, the Sn(IV) atom of the stannate anion is located on a special position with -42m symmetry. It is eight-coordinated by four chelating oxalate anions. The di­propyl­ammonium cation possesses mirror symmetry while the lattice water mol­ecule is disordered about a position with -42m symmetry and has an occupancy of 0.25. In the crystal, the anions and cations are linked by N—H⋯O hydrogen bonds, forming a three-dimensional network. This network is futher stabilized by weak O—H⋯O hydrogen bonds involving the water mol­ecules and oxalate O atoms. The crystal studied was refined as an inversion twin.