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Part of the book series: Topics in Molecular Organization and Engineering ((MOOE,volume 10))

Abstract

Structures of known isopolyoxotungstates are reviewed and an approach to their synthesis from tungsten oxoalkoxides WO(OR)4 is described. Crystal structures of the tetraalkylammonium tungstates Q2WO4.H2O [Q+ = Me4N+ or Me3(PhCH2)N+] have been determined and show the anions to be hydrogen bonded to water molecules in extended chains. Reactions between Q2WO4 and WO(OMe)4 yield the binuclear anions [W2O5(OMe)4]2- via rapid ligand redistribution, and hydrolysis of the tetrabutylammonium salt produces a new isopolytungstate characterised by its 5-line 183W NMR spectrum. This compound is reactive towards CH2Cl2 and MeNO2, producing tetranuclear species in each case. The synthesis and non-aqueous reactivity of (Bun 4N)6[H2W12O40] have also been investigated. Mo6O19 2- reacts with RNCO to give organoimido substituted [Mo6(NR)O18]2- (R = C6H4Me-4 or Bu′) and the crystal structure of the tert-butylimido compound is reported.

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Michael T. Pope Achim MĂ¼ller

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Errington, R.J., Lax, C., Richards, D.G., Clegg, W., Fraser, K.A. (1994). New Aspects of Non-Aqueous Polyoxometalate Chemistry. In: Pope, M.T., MĂ¼ller, A. (eds) Polyoxometalates: From Platonic Solids to Anti-Retroviral Activity. Topics in Molecular Organization and Engineering, vol 10. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0920-8_8

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  • DOI: https://doi.org/10.1007/978-94-011-0920-8_8

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