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Cerium(IV) Phosphido Complexes.

Ning Wang1, Xiaoyu Li2, Hui Guo3

  • 1Spin-X Institute, School of Chemistry and Chemical Engineering, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510641, China.

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|December 9, 2025
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Summary
This summary is machine-generated.

Researchers synthesized the first tetravalent lanthanide phosphido complexes, featuring cerium(IV) and phosphorus. These complexes exhibit unique bonding and reactivity, advancing organometallic chemistry.

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Area of Science:

  • Organometallic Chemistry
  • Lanthanide Chemistry
  • Inorganic Chemistry

Background:

  • Development of tetravalent lanthanide complexes lags behind trivalent congeners.
  • Phosphido ligands are crucial in stabilizing unusual oxidation states.

Purpose of the Study:

  • To synthesize and characterize the first tetravalent lanthanide phosphido complexes.
  • To investigate the electronic structure and bonding in these novel complexes.
  • To explore the preliminary reactivity of these compounds.

Main Methods:

  • Synthesis of [(ImtBuN)3CeIVP(SiMe3)Ar] complexes.
  • Single-crystal X-ray diffraction for structural characterization.
  • Computational studies (DFT) to analyze bonding.
  • Preliminary reactivity studies with azides and diazo compounds.

Main Results:

  • Successfully synthesized and structurally characterized two tetravalent cerium phosphido complexes.
  • Observed distinct geometries (pyramidal vs. trigonal planar) and Ce-P bond characteristics.
  • Computational analysis revealed significant f-orbital contributions to Ce-P σ and π bonding.
  • Complex 1 showed addition reactions, not redox processes, with tested reagents.

Conclusions:

  • Established the first tetravalent lanthanide phosphido complexes.
  • Demonstrated the influence of ligand environment on Ce-P bonding and geometry.
  • Highlighted the importance of f-orbital participation in bonding.
  • Indicated unique reactivity patterns distinct from redox behavior.