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dc.contributorWichita State University. Department of Chemistryen_US
dc.contributor.authorChien, Winnieen_US
dc.contributor.authorAnbalagan, Victoren_US
dc.contributor.authorZandler, Melvin E.en_US
dc.contributor.authorVan Stipdonk, Michael J.en_US
dc.contributor.authorHanna, Dorothy A.en_US
dc.contributor.authorGresham, Garold L.en_US
dc.contributor.authorGroenewold, Gary S.en_US
dc.identifier.citationJournal of the American Society for Mass Spectrometry. 2004 Jun; 15(6): 777-83.en_US
dc.descriptionClick on the DOI link below to access the article (may not be free).en_US
dc.description.abstractThe intrinsic hydration of three monopositive uranyl-anion complexes (UO(2)A)(+) (where A = acetate, nitrate, or hydroxide) was investigated using ion-trap mass spectrometry (IT-MS). The relative rates for the formation of the monohydrates [(UO(2)A)(H(2)O)](+), with respect to the anion, followed the trend: Acetate > or = nitrate > hydroxide. This finding was rationalized in terms of the donation of electron density by the strongly basic OH(-) to the uranyl metal center, thereby reducing the Lewis acidity of U and its propensity to react with incoming nucleophiles, viz., H(2)O. An alternative explanation is that the more complex acetate and nitrate anions provide increased degrees of freedom that could accommodate excess energy from the hydration reaction. The monohydrates also reacted with water, forming dihydrates and then trihydrates. The rates for formation of the nitrate and acetate dihydrates [(UO(2)A)(H(2)O)(2)](+) were very similar to the rates for formation of the monohydrates; the presence of the first H(2)O ligand had no influence on the addition of the second. In contrast, formation of the [(UO(2)OH)(H(2)O)(2)](+) was nearly three times faster than the formation of the monohydrate.en_US
dc.relation.ispartofseriesJournal of the American Society for Mass Spectrometryen_US
dc.relation.ispartofseriesJ. Am. Soc. Mass Spectrom.en_US
dc.titleIntrinsic hydration of monopositive uranyl hydroxide, nitrate, and acetate cationsen_US
dc.coverage.spacialUnited Statesen_US
dc.description.versionpeer revieweden_US
dc.rights.holderCopyright © 2004 American Society for Mass Spectrometryen_US

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