Journal
POLYHEDRON
Volume 22, Issue 27, Pages 3475-3482Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2003.09.008
Keywords
uranium; lanthanides; triphenylphosphine oxide; iodide; triflate; X-ray crystal structure
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The X-ray crystal structures of the title complexes show that the differences between the U-O and Ln-O distances reflect the variation in the ionic radii of the trivalent uranium and lanthanide ions while the U-I bond lengths are smaller than those predicted from a purely ionic bonding model. The results indicate that the uranium ion interacts more strongly than the lanthanide ions with the softer iodide ligand, and that the counterions would have a major influence on the differentiation of trivalent 4f and 5f ions. (C) 2003 Elsevier Ltd. All rights reserved.
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