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While
bonding in f-elements is traditionally described
as mainly electrostatic, the issue of covalency
remains an important subject of debate.
In order to answer fundamental questions
regarding trends in bonding and reactivity
of uranium and other actinide metal compounds,
the discovery and detailed investigation
of new molecules is necessary. In our efforts
to identify and isolate uranium complexes
with enhanced reactivity relevant to binding,
activation, and functionalization of small
molecules, we are currently investigating
the coordination chemistry of uranium metal
centers stabilized by classical Werner-type
ligands. The stabilizing ability of "classic"
macrocyclic amines has made this class of
chelators an indispensable tool for transition
metal coordination chemistry. However, the
coordination chemistry of uranium complexes
with macrocyclic polyamine ligands remains
largely unexplored. This is in contrast
to the thoroughly investigated organometallic
chemistry of uranium with cyclopentadienyl
ligands and their derivatives as well as
the recently developed amido chemistry of
uranium.
For
details check this out:
Castro-Rodriguez
& Meyer et al.
Uranium Tris-Aryloxide
Derivatives Supported by Triazacyclononane:
Engendering a Reactive Uranium(III) Center
with a Single Pocket of Reactivity
J. Am. Chem. Soc. 2003, 125,
4565-4571. get
it here.
Castro-Rodriguez
& Meyer et al.
A Linear, O-Coordinated
eta1-CO2 Bound to Uranium
Science 2004, 305,
1757-1759. get
it here.
I.
Castro-Rodriguez, H. Nakai, P. Gantzel,
L.N. Zakharov, A.L. Rheingold and K. Meyer
Evidence for Alkane
Coordination to an Electron-Rich Uranium
Center
J. Am. Chem. Soc. 2003, 125,
15734-15735. get
it here.
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out the News:
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