A strategy for the analysis of chiral polyoxotungstates by multinuclear (31P, 183W) NMR spectroscopy applied to the assignment of the 183W NMR spectra of alpha1-[P2W17O61]10- and alpha1-[YbP2W17O61]7-

Journal of the American Chemical Society
Géraldine LenobleRené Thouvenot

Abstract

This paper describes the complete assignment of the 183W NMR spectra of the chiral polyoxometalates alpha1-[P2W17O61]10- and alpha1-[YbP2W17O61]7- in aqueous solution. These spectra display each 17 lines of equal intensity with a relatively narrow chemical shift distribution. The identification of signals is based on selective 31P-183W decoupling and recognition of particular sets of coupling constants for tungsten atoms around the lacunary site. Further assignment is obtained by 183W 2D-COSY NMR experiments. We demonstrate herewith a new way for the unambiguous assignment of 183W NMR spectra of polyoxotungstates without any symmetry elements or tungsten atoms in special positions. This way relies on the correlation of the magnitude of 2J(W-W) coupling constants with the geometry of oxo-bridges in polyoxotungstates. These results open the way to monitor interaction sites of chiral polyoxotungstates with organic ligands.

References

Jun 6, 2003·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Alessandro BagnoGianfranco Scorrano

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Citations

Aug 5, 1991·Journal of Molecular Biology·A M Flower, C S McHenry
Oct 15, 2014·Dalton Transactions : an International Journal of Inorganic Chemistry·Jiangwei ZhangYongge Wei
Mar 24, 2016·Chemical Communications : Chem Comm·Bin ZhangLixin Wu
Sep 26, 2015·Chemistry : a European Journal·Wen-Jing XuanSerge Thorimbert
Jun 21, 2007·Chemistry : a European Journal·Nathalie Leclerc-LaronzeEmmanuel Cadot
Apr 9, 2009·Angewandte Chemie·Kévin MicoineMax Malacria
Jul 31, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Mark R AntonioLynn C Francesconi
May 1, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Qun TangChengzhan Liu
May 11, 2010·Chemistry : a European Journal·Nathalie DupréMax Malacria
Mar 19, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Zexi ZhuLixin Wu
Jul 12, 2008·Inorganic Chemistry·Jing JingMark R Antonio

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