| Publication Type |
Journal Article |
| Title |
On the Origins of Faster Oxo Exchange for Uranyl(V) versus Plutonyl(V) |
| Authors |
Daniel Rios Maria del Carmen Micheini Ana F. Lucena Joaquim Marçalo John K. Gibson |
| Groups |
IOARC |
| Journal |
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY |
| Year |
2012 |
| Month |
September |
| Volume |
134 |
| Number |
37 |
| Pages |
15488-15496 |
| Abstract |
Activation of uranyl(V) oxo bonds in the gas phase is demonstrated by reaction of (UO2+)-O-16 with (H2O)-O-18 to produce (UOO+)-O-16-O-18 and (UO2+)-O-18. In contrast, neptunyl(V) and plutonyl(V) are comparatively inert toward exchange. Computed potential energy profiles (PEPs) reveal a lower yl oxo exchange transition state for uranyl(V)/water as compared with neptunyl(V)/water and plutonyl(V)/water. A correspondence between oxo exchange rates in gas phase and acid solutions is apparent; the contrasting oxo exchange rates of UO2+ and PuO2+ are considered in the context of covalent bonding in actinyls. Hydroxo exchange of (UO2)-O-16((OH)-O-16)(+) with (H2O)-O-18 to give (UO2)-O-16((OH)-O-18)(+) proceeded much faster than oxo exchange, in accord with a lower computed transition state for OH exchange. The PEP for the addition of H2O to UO2+ suggests that both UO2+center dot(H2O) and UO(OH)(2)(+) should be considered as potential products. |
| DOI |
http://dx.doi.org/10.1021/ja305800q |
| ISBN |
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| Publisher |
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| Book Title |
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| ISSN |
0002-7863 |
| EISSN |
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| Conference Name |
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| Bibtex ID |
ISI:000308830600057 |
| Observations |
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