Isolation of diborenes and their 90°-twisted diradical congeners

Julian Böhnke, Theresa Dellermann, Mehmet Ali Celik, Ivo Krummenacher, Rian D. Dewhurst, Serhiy Demeshko, William C. Ewing, Kai Hammond, Merlin Heß, Eckhard Bill, Eileen Welz, Merle I. S. Röhr, Roland Mitrić, Bernd Engels, Franc Meyer and Holger Braunschweig ()
Additional contact information
Julian Böhnke: Julius-Maximilians-Universität Würzburg
Theresa Dellermann: Julius-Maximilians-Universität Würzburg
Mehmet Ali Celik: Julius-Maximilians-Universität Würzburg
Ivo Krummenacher: Julius-Maximilians-Universität Würzburg
Rian D. Dewhurst: Julius-Maximilians-Universität Würzburg
Serhiy Demeshko: Universität Göttingen
William C. Ewing: Julius-Maximilians-Universität Würzburg
Kai Hammond: Julius-Maximilians-Universität Würzburg
Merlin Heß: Julius-Maximilians-Universität Würzburg
Eckhard Bill: Max-Planck-Institut für Chemische Energiekonversion
Eileen Welz: Julius-Maximilians-Universität Würzburg
Merle I. S. Röhr: Julius-Maximilians-Universität Würzburg
Roland Mitrić: Julius-Maximilians-Universität Würzburg
Bernd Engels: Julius-Maximilians-Universität Würzburg
Franc Meyer: Universität Göttingen
Holger Braunschweig: Julius-Maximilians-Universität Würzburg

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract Molecules containing multiple bonds between atoms—most often in the form of olefins—are ubiquitous in nature, commerce, and science, and as such have a huge impact on everyday life. Given their prominence, over the last few decades, frequent attempts have been made to perturb the structure and reactivity of multiply-bound species through bending and twisting. However, only modest success has been achieved in the quest to completely twist double bonds in order to homolytically cleave the associated π bond. Here, we present the isolation of double-bond-containing species based on boron, as well as their fully twisted diradical congeners, by the incorporation of attached groups with different electronic properties. The compounds comprise a structurally authenticated set of diamagnetic multiply-bound and diradical singly-bound congeners of the same class of compound.

Date: 2018
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DOI: 10.1038/s41467-018-02998-3

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