First Structural Characterization of a Protactinium(V) Single Oxo Bond in Aqueous Media

The present work describes the first structural studies of protactinium(V) in sulfuric and hydrofluoric acid media using X-ray absorption spectroscopy. The results show unambiguously the absence of the trans-dioxo bond that characterizes the other early actinide elements such as U and Np. In concent...

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Bibliographic Details
Published in:	Inorganic chemistry Vol. 44; no. 25; pp. 9542 - 9546
Main Authors:	Le Naour, Claire, Trubert, Didier, Di Giandomenico, Maria V, Fillaux, Clara, Den Auwer, Christophe, Moisy, Philippe, Hennig, Christoph
Format:	Journal Article
Language:	English
Published:	United States American Chemical Society 12-12-2005
Subjects:	Chemical Physics Physics
Online Access:	Get full text
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Summary:	The present work describes the first structural studies of protactinium(V) in sulfuric and hydrofluoric acid media using X-ray absorption spectroscopy. The results show unambiguously the absence of the trans-dioxo bond that characterizes the other early actinide elements such as U and Np. In concentrated sulfuric acid (13 M), Pa(V) is proved to exhibit a single oxo bond as postulated in the literature for species in more dilute media. In a 0.5 M HF medium, XANES and EXAFS spectra indicate the absence of any oxo bond: Pa(V) exists in the form of a pure fluoro complex.
Bibliography:	ark:/67375/TPS-38DT6NQM-2 istex:FFDED1A81C5A35B145F0B40E5B1763E3AA3249C4 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0020-1669 1520-510X
DOI:	10.1021/ic0512330