caa a22 4500 378874209 CHVBK 20180305123416.0 cr unu---uuuuu 161128e20030801xx s 000 0 eng 10.1524/ract.91.8.441.20005 doi (NATIONALLICENCE)gruyter-10.1524/ract.91.8.441.20005 Einsteinium chemistry in the gas phase: exploring the divalent character of heavy actinides [Elektronische Daten] [John K. Gibson, Richard G. Haire] The first chemical studies of the monopositive einsteinium ion, Es+, in the gas phase have been carried out, and its behavior compared to those for other actinide ions, with a particular focus on Bk+. The yield of laser-ablated EsO+ indicates that the Es+-O bond energy is significantly smaller than that of Bk+-O. Fluorination of Es+ and Bk+ through F-abstraction from hexafluoropropene demonstrated clearly the stability of the divalent state of Es: whereas by this process both BkF+ and BkF2+ are produced, only the "divalent" EsF+ product is formed. The reaction of Es+ with several different alkenes produced only small yields of adducts (e.g., EsC4H8+). These adducts are the first organoeinsteinium complexes to be identified. Whereas Es+ was inert towards 1,5-cyclooctadiene, in contrast Bk+ dehydrogenated this substrate to give BkC8H8+, demonstrating the greater activation activity of Bk+ than Es+ towards alkenes. The chemical behaviors observed in these studies are consistent with the predicted electronic structure and energetics of Es+, and the results obtained are discussed in the context of systematic trends across the actinide series. © 2003 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Gibson John K. aut Haire Richard G. aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/8/2003(2003-08-01), 441-448 0033-8230 91:8/2003<441 2003 91 ract https://doi.org/10.1524/ract.91.8.441.20005 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.91.8.441.20005 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gibson John K. aut NATIONALLICENCE 700 1- Haire Richard G. aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/8/2003(2003-08-01), 441-448 0033-8230 91:8/2003<441 2003 91 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter