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Analogies between boron and carbon.

Eluvathingal D Jemmis1, Elambalassery G Jayasree

  • 1School of Chemistry, University of Hyderabad, Hyderabad, India-500 046.

Accounts of Chemical Research
|November 19, 2003
PubMed
Summary

This study reveals structural and electronic parallels between boron and carbon compounds, extending known analogies to beta-rhombohedral boron and fullerenes. These findings highlight novel connections in inorganic and organic chemistry.

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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Computational Chemistry

Background:

  • The study of boron-carbon compounds is crucial for understanding chemical bonding and material properties.
  • Existing analogies, such as borane-carbocation continuum and magnesium boride-graphite equivalence, provide a foundation for exploring new structural relationships.
  • The unique electronic structures of boron clusters and fullerenes offer potential for novel material applications.

Purpose of the Study:

  • To extend the mno rule to establish new structural connections between boron and carbon compounds.
  • To investigate the structural and electronic similarities between beta-rhombohedral boron fragments and fullerene anions.
  • To explore the potential for novel boron-carbon materials based on derived relationships.

Main Methods:

  • Application of the mno rule to analyze structural similarities.
  • Comparative analysis of known boron-carbon compound analogies.
  • Electronic structure calculations and comparisons between boron clusters and fullerides.
  • Examination of experimental data for related compounds.

Main Results:

  • Established structural similarity between pentagonal pyramidal C(6)H(6)(2+) and MgB(4).
  • Derived an electronic structural relationship between the B(84) fragment of beta-rhombohedral boron and the fulleride anion C(60)(12-).
  • Demonstrated that replacing B(6)(4-) units with isoelectronic C(5)(-) units and removing a central B(12) unit from B(84) yields this relationship.
  • Supported the derived relationship by experimental findings of C(60)M(12) and C(48)N(12).

Conclusions:

  • The mno rule effectively extends the understanding of boron-carbon compound structures beyond established analogies.
  • A significant electronic structural link exists between beta-rhombohedral boron fragments and fulleride anions.
  • These findings open avenues for designing new boron-carbon materials with tunable electronic properties.

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