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Updated: Jul 3, 2026

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
Published on: October 18, 2019
Silanol-based pincer Pt(II) complexes: synthesis, structure, and unusual reactivity
Edward E Korshin1, Gregory Leitus, Linda J W Shimon
1Department of Organic Chemistry and Unit of Chemical Research Support, Weizmann Institute of Science, 76100 Rehovot, Israel. david.milstein@weizmann.ac.il
Researchers explored platinum(II) silanol complexes, observing unusual reactivity and potential silanone intermediates. While stable silanones weren't isolated, novel binuclear complexes and silanolate platinum(II)-hydride species were formed, revealing complex reaction pathways.
Area of Science:
- Organometallic Chemistry
- Silicon Chemistry
- Coordination Chemistry
Background:
- Pincer ligands offer unique coordination environments for metal centers.
- Silanone complexes are challenging to synthesize and isolate due to their reactivity.
- Platinum(II) complexes are versatile catalysts and intermediates in various chemical transformations.
Purpose of the Study:
- To synthesize and characterize pincer-type PSiP silanol platinum(II) complexes.
- To investigate the reactivity of these complexes and explore the potential intermediacy of silanones.
- To elucidate the structural and electronic properties of novel platinum-silicon compounds.
Main Methods:
- Synthesis of PSiH2P-type ligand and its platinum(II) complexes.
- Ir(I)-catalyzed hydrolytic oxidation for silanol complex formation.
- Reactions with non-nucleophilic bases and salts to induce rearrangement and coupling.
- X-ray diffraction studies for structural characterization.
Main Results:
- A structurally characterized silanol complex [{( o-iPr2PC6H4)2SiOH}PtCl] (3) was obtained.
- Complex 3 exhibited dual reactivity, forming ionic and carbonyl complexes.
- Unprecedented rearrangement and coupling reactions led to binuclear and mononuclear silanolate platinum(II)-hydride complexes.
- Short Si-Pt bond lengths (2.27-2.28 Å) were observed in neutral complexes.
Conclusions:
- Stable silanone complexes were not isolated, but their intermediacy is suggested by observed reactivity.
- Novel platinum-silicon complexes with unique structural features and bonding were synthesized.
- The study reveals complex reaction pathways involving silanolate and silanone intermediates in platinum chemistry.
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