The intensity and position of the resonances in the 183W n.m.r. spectra of the paramagntic Ce3+(PW11O39)211– and the diamagnetic Ce4+(PW11O39)210– complex anions, which have a different solid-state structure, indicate that they also have different structures in aqueous solution; a high degree of electron delocalization from Ce3+ to the four adjacent tungsten atoms is deduced from the significant 183W chemical shifts.
L. P. Kazansky and M. A. Fedotov, J. Chem. Soc., Chem. Commun., 1983, 417 DOI: 10.1039/C39830000417
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