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metal-organic compounds
The title compound, octakis(tetramethylammonium) docosavanadate acetate hydrate, was synthesized and found to crystallize in the tetragonal system space group P42/n. 22 vanadium square pyramids form a barrel-shaped cluster which hosts the acetate ion; this is the first case where an organic molecule is hosted by a vanadium oxide cluster. The clusters are linked into a three-dimensional net by hydrogen bonds with water molecules. Tetramethylammonium ions fill the space between the clusters.