Crystal structure of bis­(ammonium) bis­[penta­aqua­(di­methyl­formamide)­zinc(II)] deca­vanadate tetra­hydrate

The crystalline product (NH(4))(2)[Zn(C(3)H(7)NO)(H(2)O)(5)](2)[V(10)O(28)]·4H(2)O was success­fully isolated from an H(2)O/DMF solvent combination by evaporation at ambient temperature. The salt crystallizes in the P2(1)/n space group. Imidazole, initially used in the synthesis but not present in the product, and DMF solvent appear to affect the synthesis and crystallization as structural-directing agents. In the title compound, the complex cation [Zn(H(2)O)(5)(DMF)](2+) acts as a counter-ion without being directly coordinated to the deca­vanadate anion. An extensive framework of hydrogen bonds integrates the whole architecture as evidenced by X-ray crystallography. The polyoxometalate [V(10)O(28)](6–) lies on a center of symmetry while the complex cation [Zn(H(2)O)(5)(DMF)](2+) links three adjacent anions through a set of 2 + 2 + 3 hydrogen bonds.