T. Chirayil et al., THE INSERTING HOST-GUEST SYSTEM IN [N(CH3)(4)](8)[(CH3COO)V22O54].4.25H(2)O, Acta crystallographica. Section C, Crystal structure communications, 54, 1998, pp. 1441-1444
The title compound, octakis(tetramethylammonium) docosavanadate acetat
e 4.25-hydrate, was synthesized and found to crystallize in the tetrag
onal space group P4(2)/n. 22 vanadium square pyramids form a barrel-sh
aped cluster which hosts the acetate ion; this is the first case where
an organic molecule is hosted by a vanadium oxide cluster. The cluste
rs are linked into a three-dimensional net by hydrogen bonds with wate
r molecules. Tetramethylammonium ions fill the space between the clust
ers.