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Heteropoly Blues

  • Chapter
Mixed-Valence Compounds

Part of the book series: NATO Advanced Study Institutes Series ((ASIC,volume 58))

Abstract

Polyoxotungstate, -molybdate and -vanadate anions in which the metal atoms occupy sites of approximately C4V symmetry with one terminal oxygen each, are reducible in reversible one- or two-electron steps to mixed-valence polyanions (heteropoly blues). Variable temperature electron spin resonance (ESR) spectroscopy of the reduced anions reveals that the added electrons are trapped at W(V), Mo(V) centers at temperatures between 50 and 120K depending upon the structure of the anion. Other spectroscopic studies of heteropoly blues are reviewed. Certain polyoxotungstate s may be reduced beyond the ‘blue’ stage to give isostructural complexes with firmly trapped W(IV) + W(VI) valences. The latter complexes contain metal-metal bonds and may be reduced even further to give fully delocalized species with an average metal oxidation state of +10/3.

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Authors and Affiliations

  1. Department of Chemistry, Georgetown University, Washington,D.C, USA, 20057

    Michael T. Pope

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  1. Michael T. Pope
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Editors and Affiliations

  1. Department of Chemistry, The University of Vermont, Cook Physical Science Building, Burlington, Vermont, USA

    David B. Brown

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© 1980 D. Reidel Publishing Company

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Pope, M.T. (1980). Heteropoly Blues. In: Brown, D.B. (eds) Mixed-Valence Compounds. NATO Advanced Study Institutes Series, vol 58. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-9076-0_12

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  • DOI: https://doi.org/10.1007/978-94-009-9076-0_12

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-009-9078-4

  • Online ISBN: 978-94-009-9076-0

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