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Polydentate bridging ligands can be used to link small polyoxo-alkoxo-metalate units to form supramolecular clusters. In the title compound, twelve μ4-bridging squarato groups connect eight trinuclear methoxo-oxo-vanadate units to form a tetradodecanuclear cubic framework (see picture), in whose cavity six n-butyl groups of the tetra-n-butylammonium cations are anchored.
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Spandl et al. (2001) studied this question.
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