Oxygen-isotope exchange rates for three isostructural polyoxometalate ions

Eric Villa, Christian Andre Ohlin, William Casey

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We compare oxygen-isotope exchange rates for all structural oxygens in three polyoxoniobate ions that differ by systematic metal substitutions of Ti(IV) f Nb(V). The [HxNb10O28](6-x)-, [HxTiNb9O28](7-x)-, and [HxTi2Nb8O28](8-x)- ions are all isostructural yet have different r??nsted properties. Rates for sites within a particular molecule in the series differ by at least a??104, but the relative reactivities of the oxygen sites rank in nearly the same relative order for all ions in the series.
Original languageEnglish
Pages (from-to)5264 - 5272
Number of pages9
JournalJournal of the American Chemical Society
Issue number14
Publication statusPublished - 2010
Externally publishedYes

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