Crystal structure of bis(ammonium) bis[pentaaqua(dimethylformamide)zinc(II)] decavanadate tetrahydrate
Abstract
The crystalline product (NH4)(2)[Zn(C3H7NO)(H2O)(5)](2)[V10O28] . 4H2O was successfully isolated from an H2O/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(H2O)(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 [V10O28](6-) lies on a center of symmetry while the complex cation [Zn(H2O)(5)(DMF)](2+) links three adjacent anions through a set of 2 + 2 + 3 hydrogen bonds.