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Hepta- and Octacoordinate Boron in Molecular Wheels of Eight- and Nine-Atom Boron Clusters: Observation and Confirmation†

  1. Hua-Jin Zhai Dr.1,
  2. Anastassia N. Alexandrova2,
  3. K. Alexander Birch2,
  4. Alexander I. Boldyrev Prof. Dr.2,
  5. Lai-Sheng Wang Prof. Dr.1

Article first published online: 10 DEC 2003

DOI: 10.1002/anie.200351874

Issue

Angewandte Chemie International Edition

Angewandte Chemie International Edition

Volume 42, Issue 48, pages 6004–6008, December 15, 2003

Additional Information

How to Cite

Zhai, H.-J., Alexandrova, A. N., Birch, K. A., Boldyrev, A. I. and Wang, L.-S. (2003), Hepta- and Octacoordinate Boron in Molecular Wheels of Eight- and Nine-Atom Boron Clusters: Observation and Confirmation. Angewandte Chemie International Edition, 42: 6004–6008. doi: 10.1002/anie.200351874

Author Information

  1. 1

    Department of Physics, Washington State University, 2710 University Drive, Richland, WA 99352, USA, and, W. R. Wiley Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, MS K8-88, P. O. Box 999, Richland, WA 99352, USA, Fax: (+1) 509-376-6066

  2. 2

    Department of Chemistry and Biochemistry, Utah State University, Logan, UT 84322-0300, USA

  1. †

    The theoretical work done at Utah State University was supported by the donors of The Petroleum Research Fund (PRF No. 38242-AC6), administered by the American Chemical Society. The experimental work done at Washington was supported by the US National Science Foundation (DMR-0095828) and performed at the W. R. Wiley Environmental Molecular Sciences Laboratory, a national scientific user facility sponsored by DOE's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory, operated for DOE by Battelle.

Publication History

  1. Issue published online: 10 DEC 2003
  2. Article first published online: 10 DEC 2003
  3. Manuscript Revised: 25 JUL 2003
  4. Manuscript Received: 12 MAY 2003

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Keywords:

  • ab initio calculations;
  • aromaticity;
  • boron;
  • cluster compounds;
  • photoelectron spectroscopy

Graphical Abstract

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Two types of aromaticity: Experimental and theoretical evidence shows that eight- and nine-atom boron clusters are perfectly planar molecular wheels, with a hepta- or octacoordinated central boron atom, respectively (see picture, B green). The radii of the miniature molecular wheels are found to be 1.8 and 2.0 Å. Analyses of their chemical bonding reveal that they possess double (σ and π) aromaticity, which is responsible for the wheel structures and the extreme coordination environments.

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