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Updated: May 7, 2026
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The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
11.1K
Tris(phosphinoamide)-supported uranium-cobalt heterobimetallic complexes featuring Co → U dative interactions
J Wesley Napoline1, Steven J Kraft, Ellen M Matson
1Department of Chemistry, Brandeis University , 415 South Street, Waltham, Massachusetts 02454, United States.
Inorganic Chemistry
|October 12, 2013
Summary
New heterobimetallic cobalt-uranium complexes were synthesized. These complexes feature short cobalt-uranium distances, with one exhibiting the shortest transition metal-uranium bond ever reported, offering insights into metal-metal interactions.
Area of Science:
- Organometallic Chemistry
- Inorganic Chemistry
- Actinide Chemistry
Background:
- Phosphinoamide ligands are versatile coordinating agents.
- Uranium and cobalt complexes offer unique electronic and structural properties.
Purpose of the Study:
- Synthesize novel heterobimetallic cobalt-uranium complexes.
- Investigate the structural and electronic properties of these Co-U complexes.
- Explore the nature of transition metal-actinide interactions.
Main Methods:
- Synthesis of uranium precursors: (η(2)-Ph2PN(i)Pr)4U, (η(2)-(i)Pr2PNMes)4U, (η(2)-Ph2PN(i)Pr)3UCl, and (η(2)-(i)Pr2PNMes)3UI.
- Formation of heterobimetallic Co/U complexes via reaction with CoI2.
- Structural characterization using X-ray diffraction.
- Electrochemical studies using cyclic voltammetry.
- Theoretical calculations to elucidate metal-metal interactions.
Main Results:
- Successfully synthesized a series of tris- and tetrakis(phosphinoamide) U/Co complexes.
- Structural characterization revealed short Co-U interatomic distances, with complex 7 showing the shortest reported transition metal-uranium distance (2.874(3) Å).
- Cyclic voltammetry and theoretical studies provided insights into the metal-metal interaction's influence on redox properties.
Conclusions:
- Demonstrated the feasibility of synthesizing heterobimetallic Co-U complexes with phosphinoamide ligands.
- Reported the shortest transition metal-uranium bond distance to date.
- Highlighted the potential for studying unique electronic interactions between transition metals and actinides.
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