Structural peculiarities of actinyl complexation with monolacunary polyoxometalates

Uranium(VI) complex with silicoundecatungstate, K7H6[K(UO2)(H2O)(α-SiW11O39)2]·21H2O, has been obtained and its structure has been determined using X-ray single crystal diffractometry and confirmed by electron and IR absorption spectroscopy. The stability of An(VI) complexes with monolacunary heteropolyanions in solution is discussed from the structural point of view.

Graphical AbstractCrystal structure of uranium(VI) complex with silicoundecatungstate, K7H6[K(UO2)(H2O)(α-SiW11O39)2]·21H2O, has been determined using X-ray diffractometry and confirmed by electron and IR absorption spectroscopy. The stability of An(VI) complexes with monolacunary heteropolyanions in solution is discussed from the structural point of view.Figure optionsDownload as PowerPoint slideResearch Highlights
► Crystal structure of K7H6[K(UO2)(H2O)(α-SiW11O39)2]·21H2O has been determined.
► The uranium atom coordinates two oxygen atoms of lacuna of each anion.
► The pH-dependence of An(VI) complexes stability is explained.