Abstract
Abstract Using highly negatively charged Keggin polyoxometalates (POMs), [α-XW12O40]5− (X = Al and B), novel intercluster compounds composed of a tetrakis{triphenylphosphanegold(I)}oxonium cation and an α-Keggin POM linked by three monomeric triphenylphosphanegold(I) units were prepared. A single peak was observed in the solution 31P{1H} NMR for these clusters, which is consistent with rapid exchange of the phosphanegold(I) units in the tetra{phosphanegold(I)}oxonium cluster cation with the three monomeric phosphanegold(I) species linked to the POM. Importantly, these compounds may be relevant transition states or intermediates in POM-mediated tetra{phosphanegold(I)}oxonium cluster formation.
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