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Updated: Jun 25, 2025
07:20
Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
Published on: May 28, 2014
14.0K
A-Frame-Templated High-Coordinate Platinum(IV) cis-Bis(boryl) Complexes
Max Passargus1,2, Merle Arrowsmith1,2, Rüdiger Bertermann1,2
1Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, Würzburg 97074, Germany.
Inorganic Chemistry
|May 25, 2024
Summary
Platinum complexes react with boron halides, forming new platinum-boron bonds. These reactions reveal insights into halide exchange mechanisms and unique platinum-borenium interactions.
Area of Science:
- Inorganic Chemistry
- Organometallic Chemistry
- Materials Science
Background:
- Platinum(II) A-frame complexes with BNBN-cumulene bridges are known.
- Boron halides (BF3, BCl3, BBr3, BI3) are reactive electrophiles.
Purpose of the Study:
- To investigate the reactions of Pt(II) A-frame complexes with boron halides.
- To characterize the resulting platinum-boron adducts and understand their bonding.
- To elucidate the mechanisms of halide exchange reactions.
Main Methods:
- Synthesis of platinum-boron complexes.
- X-ray crystallography for structural determination.
- Multinuclear NMR spectroscopy for characterization.
Main Results:
- Oxidative addition of B-X bonds to the BNBN moiety, forming Pt-BF2 or Pt-BCl2 adducts.
- Weak Pt→BF2 electrostatic interaction versus stronger Pt→BCl2 donor-acceptor bond.
- Formation of mixed-valence Pt(II)-Pt(IV) complexes and complex product mixtures with BBr3 and BI3.
- Evidence of extensive inter- and intramolecular bromide-iodide exchange.
- Generation of cationic Pt(II)-Pt(II)-borenium complexes with a rare metal→borenium bond.
Conclusions:
- The reactivity of Pt(II) A-frame complexes with boron halides leads to diverse platinum-boron species.
- The nature of the Pt-B bond varies from electrostatic to strong donor-acceptor interactions.
- Halide exchange is a significant process in these systems, influenced by halide and metal affinities.
- The study demonstrates the formation of unusual platinum-borenium complexes, highlighting novel coordination chemistry.
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