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CO2 Binding and Splitting by Boron-Boron Multiple Bonds.

Andreas Stoy1,2, Julian Böhnke1,2, J Oscar C Jiménez-Halla3

  • 1Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.

Angewandte Chemie (International Ed. in English)
|March 2, 2018
PubMed
Summary
This summary is machine-generated.

Reactions of carbon dioxide (CO2) with boron-boron multiple bonds incorporate one or two CO2 molecules. A [2+2] cycloaddition mechanism is indicated by an intermediate

Keywords:
CO2 fixationboroncarbon dioxidediborenesdiborynes

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Area of Science:

  • Inorganic Chemistry
  • Organoboron Chemistry
  • Reaction Mechanisms

Background:

  • Boron-boron multiple bonds are reactive functional groups.
  • Carbon dioxide (CO2) is an abundant and important C1 building block.

Purpose of the Study:

  • To investigate the reactivity of boron-boron multiple bonds with CO2.
  • To elucidate the reaction mechanism of CO2 incorporation.

Main Methods:

  • Reactions were conducted at room temperature and ambient pressure.
  • Structural characterization of reaction intermediates was performed.

Main Results:

  • Two species with boron-boron multiple bonds reacted with CO2.
  • Incorporation of one or two CO2 molecules was achieved.
  • A thermally unstable intermediate suggests an initial [2+2] cycloaddition mechanism.

Conclusions:

  • Boron-boron multiple bonds can react with CO2 under mild conditions.
  • The reaction proceeds via a cycloaddition pathway.
  • This work expands the synthetic utility of organoboron compounds.