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A Versatile Approach to Access Trimetallic Complexes Based on Trisphosphinite Ligands.

Juan Miranda-Pizarro1, Macarena G Alférez1, M Dolores Fernández-Martínez1

  • 1Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Avenida Américo Vespucio 49, 41092 Sevilla, Spain.

Molecules (Basel, Switzerland)
|February 5, 2020
PubMed
Summary

A new one-step synthesis yields versatile trisphosphinite ligands. These ligands form diverse homotrimetallic complexes with late transition metals, showcasing flexible coordination chemistry.

Keywords:
coordination polymermultidentate ligandsphosphinitepolymetallicsupramolecular chemistrytrimetallic

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Area of Science:

  • Coordination Chemistry
  • Organometallic Chemistry
  • Ligand Synthesis

Background:

  • Trisphosphinite ligands are valuable in coordination chemistry.
  • Developing efficient synthetic routes for novel ligands is crucial for exploring new metal complexes.

Purpose of the Study:

  • To develop a straightforward, one-step method for synthesizing trisphosphinite ligands.
  • To investigate the coordination chemistry of these ligands with late transition metals.
  • To characterize the resulting homotrimetallic complexes.

Main Methods:

  • One-step synthesis using 1,1,1-tris(4-hydroxyphenyl)ethane and chlorophosphines.
  • Preparation of four trisphosphinite ligands with varying R groups (Ph, Xyl, iPr, Cy).
  • Coordination studies with Au(I), Ag(I), Cu(I), Ir(III), Rh(III), and Ru(II) precursors.
  • Full characterization of metal complexes, including X-ray diffraction.

Main Results:

  • Successfully synthesized a family of four trisphosphinite ligands.
  • Prepared and characterized numerous Au(I), Ag(I), Cu(I), Ir(III), Rh(III), and Ru(II) homotrimetallic complexes.
  • Six complex structures were confirmed by X-ray diffraction.
  • Demonstrated the flexible coordination capabilities of the trisphosphinite ligands.

Conclusions:

  • The developed method provides efficient access to novel trisphosphinite ligands.
  • These ligands exhibit versatile coordination behavior with late transition metals.
  • The flexibility of the ligands allows for diverse conformations in trimetallic complexes.