X-Ray Diffraction Evidence for a Cyclohexatriene Motif in the Molecular Structure of Tris(bicyclo[2.1.1]hexeno)benzene: Bond Alternation after the Refutation of the Mills–Nixon Theory

Authors

  • Prof. Dr. Hans-Beat Bürgi,

    Corresponding author
    1. Laboratorium für Chemische und Mineralogische Kristallographie der Universität, CH-3012 Bern (Switzerland)
    • Laboratorium für Chemische und Mineralogische Kristallographie, der Universität, CH-3012 Bern (Switzerland)
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  • Dr. Kim K. Baldridge,

    1. San Diego Supercomputer Center, San Diego, CA (USA)
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  • Prof. Kenneth Hardcastle,

    1. Department of Chemistry, California State University-Northridge, Northridge, CA (USA)
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  • Natia L. Frank,

    1. Department of Chemistry, University of California-San Diego, La Jolla, CA 92093-0358 (USA). Telefax: Int. code + (619) 534-5383
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  • Dr. Peter Gantzel,

    1. Department of Chemistry, University of California-San Diego, La Jolla, CA 92093-0358 (USA). Telefax: Int. code + (619) 534-5383
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  • Prof. Jay S. Siegel,

    Corresponding author
    1. Department of Chemistry, University of California-San Diego, La Jolla, CA 92093-0358 (USA). Telefax: Int. code + (619) 534-5383
    • Department of Chemistry, University of California-San Diego, La Jolla, CA 92093-0358 (USA). Telefax: Int. code + (619) 534-5383
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  • Dr. Joseph Ziller

    1. Department of Chemistry, University of California-Irvine, Irvine, CA (USA)
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  • This work was supported by the National Science Foundation (CHE-9307582, ASC-8902827), the Alfred P. Sloan Foundation (J. S. S), and the Schweizerischen Nationalfonds zur Förderung der wissenschaftlichen Forschung (H. B. B). The San Diego Supercomputer Center provided a grant for computing time.

Abstract

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Cyclohexatriene lost, cyclohexatriene regained! Recently the Mills–Nixon postulate concerning the structure of benzene derivatives was recognized to be invalid. A new view on strain-induced bond localization in benzene led to the design and synthesis of tris(bicyclo[2.1.1]hexeno)benzene (1), which shows significant distortion toward a cyclohexatriene geometry.

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