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Related Experiment Video

Updated: Jul 7, 2026

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
09:45

Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene

Published on: March 20, 2017

Group 13 decamethylmetallocenium cations.

Charles L B Macdonald1, John D Gorden, Andreas Voigt

  • 1Department of Chemistry and Biochemistry, The University of Texas at Austin, 1 University Station A5300, Austin, TX 78712, USA.

Dalton Transactions (Cambridge, England : 2003)
|February 20, 2008
PubMed
Summary
This summary is machine-generated.

Salts of decamethylmetallocenium cations for Boron, Aluminum, and Gallium (Cp*(2)M(+)) were synthesized. Gallium cations are less stable, with electronic structures resembling Aluminum, despite similar molecular structures to Boron.

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Published on: October 30, 2018

Area of Science:

  • Organometallic chemistry
  • Main group element chemistry
  • Coordination chemistry

Background:

  • Decamethylmetallocenium cations (Cp*(2)M(+)) are important in organometallic chemistry.
  • Group 13 elements (Boron, Aluminum, Gallium) offer unique electronic and structural properties.
  • Understanding the synthesis and stability of these cations is crucial for developing new materials.

Purpose of the Study:

  • To synthesize and characterize decamethylmetallocenium cations of Boron, Aluminum, and Gallium.
  • To investigate the structural and electronic properties of these novel compounds.
  • To compare the stability and reactivity of the synthesized cations.

Main Methods:

  • Synthesis of precursor molecules Cp*(2)MX (X=Cl, Br, Me).
  • Utilized salt metathesis, halide abstraction, and methanide abstraction for B and Al cations.
  • Employed acidolysis of Cp*(3)Ga for Gallium cation synthesis.
  • Density Functional Theory (DFT) calculations for structural and electronic analysis.

Main Results:

  • Successfully prepared decamethylmetallocenium salts for Boron, Aluminum, and Gallium.
  • Observed significant variations in structural features based on the central atom's size and electronegativity.
  • Gallium cations exhibited lower stability due to ligand back-transfer from counter anions.
  • DFT calculations indicated Cp*(2)Ga(+) has a molecular structure akin to Cp*(2)B(+) but an electronic structure closer to Cp*(2)Al(+).

Conclusions:

  • Established viable synthetic routes for Group 13 decamethylmetallocenium cations.
  • Highlighted the reduced stability of Gallium cations compared to Boron and Aluminum analogues.
  • Computational studies provided insights into the electronic and structural nuances of these metallocenium ions.