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The aromatic dianion metalloles.

Junnian Wei1, Wen-Xiong Zhang1, Zhenfeng Xi1

  • 1Beijing National Laboratory for Molecular Sciences (BNLMS) , Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education , College of Chemistry , Peking University , Beijing 100871 , China . Email: jnwei@foxmail.com ;

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|April 21, 2018
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Summary
This summary is machine-generated.

Dianion metalloles, featuring unique aromatic systems, are reviewed. These metalloles, utilizing non-innocent ligands, expand the understanding of aromaticity and offer new avenues for organometallic chemistry.

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Area of Science:

  • Organometallic Chemistry
  • Aromaticity Studies
  • Materials Science

Background:

  • Metalloaromatic species are crucial in both experimental and theoretical chemistry.
  • Recent decades have seen significant advancements in understanding aromaticity.
  • New aromatic systems continually challenge and expand the definition of aromaticity.

Purpose of the Study:

  • To review recent findings on dianion aromatic metalloles and their analogues.
  • To highlight the structural and electronic properties of these unique compounds.
  • To discuss future opportunities in metalloaromatic chemistry.

Main Methods:

  • X-ray crystallography for structural elucidation.
  • Theoretical tools like NICS and AdNDP for aromaticity assessment.
  • Synthesis and characterization of various metallole derivatives.

Main Results:

  • Dianion metalloles, including group 14, 13, and transition metal variants, exhibit significant aromatic character.
  • The dianion butadiene skeleton acts as a non-innocent ligand, crucial for aromatic ring formation.
  • Structural and theoretical analyses confirm the extended aromaticity beyond Hückel's rule.
  • Analogues like dicupra[10]annulenes and spiroaromatic palladoles demonstrate synthetic versatility.

Conclusions:

  • Dianion metalloles represent a significant expansion of aromatic chemistry.
  • These compounds serve as valuable non-innocent ligands in organometallic complexes.
  • Future research can focus on novel applications and the synthesis of new metalla-macrocyclic systems.