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Di(indenyl)beryllium.

Ross F Koby1, Nathan D Schley1, Timothy P Hanusa1

  • 1Department of Chemistry, Vanderbilt University, Nashville, TN, 37235, USA.

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|July 6, 2021
PubMed
Summary
This summary is machine-generated.

Mechanochemistry enabled the synthesis of novel beryllium-indenyl complexes, overcoming challenges with traditional methods. These complexes exhibit unique bonding structures, expanding our understanding of organoberyllium chemistry.

Keywords:
BerylliumFluxionalIndenylMechanochemistrySlipped bonding

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Area of Science:

  • Organometallic Chemistry
  • Inorganic Chemistry
  • Materials Science

Background:

  • Beryllocene (BeCp2) bonding and hapticity were challenging to elucidate.
  • Organoberyllium complexes with indenyl ligands were previously unknown.
  • Indenyl ligands are known for bonding peculiarities, including hapticity shifts.

Purpose of the Study:

  • To synthesize and characterize novel beryllium-indenyl complexes.
  • To explore new synthetic routes for organoberyllium compounds.
  • To investigate the bonding and structural properties of these complexes.

Main Methods:

  • Mechanochemical synthesis involving solvent-free grinding of beryllium bromide and potassium indenides.
  • Isolation and characterization of discrete beryllium-indenyl complexes.
  • Density Functional Theory (DFT) calculations to analyze electronic structure and conformations.

Main Results:

  • Successful synthesis of discrete (indenyl)beryllium complexes, [Be(C9H7)2] (1) and [Be{1,3-(SiMe3)2C9H5}Br] (2).
  • Complex 1 exhibits mixed η5/η1-coordination in the solid state.
  • DFT calculations suggest the η5/η5-conformation is energetically accessible.

Conclusions:

  • Mechanochemistry is a viable and effective method for synthesizing challenging organoberyllium complexes.
  • The synthesized complexes display unique bonding modes, similar to beryllocene.
  • Further research into beryllium-indenyl systems is warranted.