Isolation of the elusive heptavanadate anion with trisalkoxide ligands
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- AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2017-89553-P/ES/
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The unprecedented heptavanadate cluster has been isolated from reactions between trisalkoxide ligands and vanadatein water at pH = 2 as a series of alkylammonium HxV7O18(H2O)((OCH2)3CR)‑salts (1−3,R=CH2OH;4,R=CH3). Their structures have been determined and the partial stability of4 in water assessed by a combination of multinuclear NMR spectroscopyand ESI-MS. The heptavanadate unit reported herein could represent an intermediate species in the formation of decavanadate thatis blocked by attachment of tripodal ligands.
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