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Related Experiment Videos

Zwitterionic ring-borylated ansa-chromocene complexes.

Piet-Jan Sinnema1, Pamela J Shapiro, David Min Jin Foo

  • 1Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343.

Journal of the American Chemical Society
|September 13, 2002
PubMed
Summary

Researchers synthesized a novel zwitterionic chromium complex, the first structurally characterized bent-metallocene of Cr(4+). This complex undergoes thermal decomposition, yielding new zwitterionic and ionic chromium species.

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Area of Science:

  • Organometallic Chemistry
  • Boron Chemistry
  • Chromium Complexes

Background:

  • Bent-metallocene complexes are crucial in catalysis and materials science.
  • Chromium complexes, particularly in higher oxidation states, offer unique reactivity.
  • Ring borylation is a key transformation for functionalizing organometallic compounds.

Purpose of the Study:

  • To synthesize and structurally characterize a novel bent-metallocene chromium complex.
  • To investigate the thermal decomposition pathways of the synthesized complex.
  • To explore the reactivity of chromium in a high oxidation state (Cr(4+)).

Main Methods:

  • Ring borylation reaction using B(C6F5)3.
  • Single-crystal X-ray diffraction for structural determination.

Related Experiment Videos

  • Thermal decomposition studies and characterization of products.

    • Main Results:

    • Synthesis of the zwitterionic complex {Me4(eta5-C5H4)(eta5-C4H3B(C6F5)3)}CrH(CO) (1), the first structurally characterized bent-metallocene of Cr(4+).
    • Thermal decomposition of complex 1 yielded a new zwitterionic species {Me4(eta5-C5H4)(eta5-C4H3B(C6F5)3)}Cr (2) and an ionic species [Me4C2(eta5-C5H4)2CrCO][HB(C6F5)3] (3).
    • The molecular structure of the zwitterionic species 2 was also elucidated.

    Conclusions:

    • The study reports the first structurally characterized bent-metallocene complex of Cr(4+).
    • The thermal decomposition pathways provide insights into the stability and reactivity of these novel chromium complexes.
    • This work expands the scope of known organometallic chromium chemistry and borylation reactions.