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Heavier Diferrocenylpnictogenium Ions.

Corina Stoian1, Marian Olaru1, Serhiy Demeshko2

  • 1Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359, Bremen, Germany.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|October 29, 2024
PubMed
Summary
This summary is machine-generated.

Researchers synthesized and characterized heavier diferrocenylpnictogenium ions ([Fc2E]+, E=As, Sb, Bi), extending previous work on the diferrocenylphosphenium ion. Intramolecular iron coordination stabilizes these Lewis acidic compounds.

Keywords:
Carbene analoguesCationsFerroceneLewis acidsPnictogenium ions

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Area of Science:

  • Organometallic Chemistry
  • Main Group Chemistry
  • Coordination Chemistry

Background:

  • Diferrocenylphosphenium ions ([Fc2P]+) are known compounds.
  • Extending the study to heavier pnictogens (As, Sb, Bi) is of interest.

Purpose of the Study:

  • To synthesize and characterize heavier diferrocenylpnictogenium ions ([Fc2E]+, E=As, Sb, Bi).
  • To investigate the structural, electronic, and reactivity properties of these compounds.
  • To compare the properties with the lighter diferrocenylphosphenium ion.

Main Methods:

  • Synthesis of [Fc2E]+ (E=As, Sb, Bi) compounds.
  • Characterization using X-ray crystallography and spectroscopy.
  • Determination of Lewis acidities using the Gutmann-Beckett method.
  • Electrochemical oxidation and reduction studies.

Main Results:

  • Successful synthesis and structural characterization of [Fc2E]+ (E=P, As, Sb, Bi).
  • Observation of intramolecular iron coordination to the pnictogen atoms.
  • Compounds exhibit strong Lewis acidity.
  • Oxidation leads to dications [Fc2E]2+ (E=P, As) and reduction yields neutral dipnictogens Fc2EEFc2 (E=P, As).

Conclusions:

  • Intramolecular iron coordination stabilizes the electron-deficient pnictogen center.
  • The synthesized compounds are strong Lewis acids.
  • The reactivity includes formation of dications and neutral dipnictogens.