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Diboryldiborenes: π‐Conjugated B4 Chains Isoelectronic to the Butadiene Dication |
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| Authors: | Alexander Hermann Dr. Jessica Cid James D. Mattock Dr. Rian D. Dewhurst Dr. Ivo Krummenacher Dr. Alfredo Vargas Dr. Michael J. Ingleson Prof. Dr. Holger Braunschweig |
| Affiliation: | 1. Institute for Inorganic Chemistry, Julius-Maximilians-Universit?t Würzburg, Würzburg, Germany;2. Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universit?t Würzburg, Würzburg, Germany;3. School of Chemistry, University of Manchester, Manchester, UK;4. Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, Sussex, UK |
| Abstract: | B(sp2)–B(sp3) diborane species based on bis(catecholato)diboron and N‐heterocyclic carbenes (NHCs) underwent catechol/bromide exchange selectively at the sp3‐hybridized boron atom. The reduction of the resulting 1,1‐dibromodiborane adducts led to reductive coupling and isolation of doubly NHC‐stabilized 1,2‐diboryldiborenes. These compounds are the first examples of molecules exhibiting π‐electron delocalization over an all‐boron chain. |
| Keywords: | boron chains diboranes diborenes N-heterocyclic carbenes π -conjugation |