¹⁸²Tungsten Mössbauer spectroscopy of heteropolytungstates

Bochet, Christian G.; Draper, Thérèse; Bocquet, Bernard; Pope, Michael T.; Williams, Alan F.

doi:10.1039/B904101J

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¹⁸²Tungsten Mössbauer spectroscopy of heteropolytungstates

Bochet, Christian G. Section of Chemistry and Biochemistry, University of Geneva, Switzerland - Chemistry Department, University of Fribourg, Switzerland
Draper, Thérèse Section of Chemistry and Biochemistry, University of Geneva, Switzerland
Bocquet, Bernard Section of Chemistry and Biochemistry, University of Geneva, Switzerland
Pope, Michael T. Department of Chemistry, Georgetown University, USA
Williams, Alan F. Section of Chemistry and Biochemistry, University of Geneva, Switzerland

07.05.2009

Published in:

Dalton Transaction. - 2009, vol. 26, p. 5127-5131

English The tungsten-182 Mössbauer spectra of a series of Keggin structure heteropolytungstates, [EW₁₂O₄₀]ⁿ⁻ are reported. There is a very considerable variation in quadrupole coupling at the tungsten nucleus indicating considerable asymmetry in the electron distribution for the more electronegative elements E. The quadrupole coupling correlates well with the structural data, in particular with the distance between the tungsten and the oxygen atom of the EO₄ group. These compounds may be regarded as rigid W₁₂O₃₆ cages interacting more or less strongly with an EO₄ⁿ⁻ host. The spectra of salts of metatungstate [H₂W₁₂O₄₀]⁶⁻ and [W₆O₁₉]²⁻ are also given.

Faculty

Faculté des sciences et de médecine

Department

Département de Chimie

Language