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10:19
Synthesis and Testing of Supported Pt-Cu Solid Solution Nanoparticle Catalysts for Propane Dehydrogenation
Published on: July 18, 2017
Transmetalation supported by a Pt(II)-Cu(I) bond
Marc-Etienne Moret1, Daniel Serra, Andreas Bach
1Laboratorium für Organische Chemie, ETH Zürich, Switzerland.
Angewandte Chemie (International Ed. in English)
|March 17, 2010
Summary
Platinum-to-copper methyl transfer occurs when specific metal cations interact. This study investigates the thermochemistry of this methyl transfer process using mass spectrometry.
Area of Science:
- Organometallic Chemistry
- Coordination Chemistry
- Mass Spectrometry
Background:
- The interaction between copper and platinum complexes can lead to unique chemical transformations.
- Methyl transfer reactions are fundamental in organometallic chemistry and catalysis.
- Collision-induced dissociation (CID) is a powerful technique for studying gas-phase ion chemistry.
Purpose of the Study:
- To investigate platinum-to-copper methyl transfer upon collision-induced dissociation (CID) of cationic complexes.
- To explore the influence of phosphine ligands (R3P) on copper and the role of dimethylphosphinoethane (dmpe) on platinum in this transfer.
- To determine the thermochemistry of the methyl transfer process for a specific ligand (R=Me) using mass-spectrometric methods.
Main Methods:
- Formation of cationic complexes from the interaction of [(R3P)Cu]+ and [(dmpe)PtMe2].
- Analysis of these cations using collision-induced dissociation (CID) in mass spectrometry.
- Thermochemical investigation of the R=Me system via mass-spectrometric techniques.
Main Results:
- Observation of platinum-to-copper methyl transfer during CID of the studied cations.
- The study includes the X-ray crystal structure of coordination spheres for R=tBu, providing structural insights.
- Thermochemical data for the R=Me case was obtained.
Conclusions:
- The findings demonstrate a novel methyl transfer pathway between platinum and copper centers in the gas phase.
- The study provides insights into the reactivity and stability of organometallic cations under CID conditions.
- Mass spectrometry and structural analysis are valuable tools for elucidating complex organometallic reaction mechanisms.
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