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Progress in Polyarsolyl Chemistry.

Claudia Heindl1, Eugenia V Peresypkina2,3, Alexander V Virovets2,3

  • 1Institut für Anorganische Chemie, Universität Regensburg, 93040, Regensburg, Germany.

Chemistry (Weinheim an Der Bergstrasse, Germany)
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PubMed
Summary
This summary is machine-generated.

Researchers synthesized novel arsenic and phosphorus compounds, creating the first 1,2,4-triarsolyl and tetraarsolyl anions. These planar heterocyclic salts exhibit aromaticity, expanding the scope of heteroatom ligand chemistry.

Keywords:
cyclopentadienyl ligandsheterocyclesinorganic ring systemspolyarsolylpolyphospholyl

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Area of Science:

  • Organometallic Chemistry
  • Main Group Chemistry
  • Ligand Design

Background:

  • The cyclopentadienyl anion (Cp-) is a fundamental ligand in organometallic chemistry.
  • Phosphorus analogues of Cp-, such as phospholyl ligands, are well-studied.
  • Arsenic analogues remain underexplored, with specific structures like 1,2,4-triarsolyl and tetraarsolyl anions being unknown.

Purpose of the Study:

  • To synthesize and characterize novel heteroatom analogues of the cyclopentadienyl anion, specifically focusing on arsenic derivatives.
  • To report the first synthesis of 1,2,4-triarsolyl and tetraarsolyl anions.
  • To investigate the structural and electronic properties of these new compounds.

Main Methods:

  • One-pot synthesis utilizing tris(trimethylsilyl) compounds of phosphorus or arsenic (E(SiMe3)3), 2,4,6-triisopropylbenzoyl chloride, and cesium fluoride (CsF).
  • Characterization techniques including X-ray structural analysis.
  • Computational analysis using nucleus-independent chemical shifts (NICS) to assess aromaticity.

Main Results:

  • Successful synthesis of cesium salts of triphospholyl (1a), triarsolyl (1b), tetraphospholyl (2a), and tetraarsolyl (2b) anions.
  • Compound 1b represents the first reported 1,2,4-triarsolyl anion.
  • Compound 2b represents the first reported tetraarsolyl anion.
  • X-ray crystallography confirmed planar structures for the synthesized heterocycles.
  • NICS calculations verified the aromatic nature of these novel anions.
  • Compound 2a is the second structurally characterized tetraphospholyl ligand.

Conclusions:

  • Established efficient one-pot synthetic routes to previously unknown arsenic and phosphorus heterocyclic anions.
  • Demonstrated the feasibility of synthesizing planar, aromatic triarsolyl and tetraarsolyl systems.
  • Expanded the library of heteroatom ligands, offering new possibilities for coordination chemistry and materials science.