Cobalt Boryl Complexes: Enabling and Exploiting Migratory Insertion in Base‐Metal‐Mediated Borylation |
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| Authors: | Dr René Frank James Howell Jésus Campos Rémi Tirfoin Nicholas Phillips Dr Stefan Zahn Prof Dr D Michael P Mingos Prof Dr Simon Aldridge |
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| Institution: | 1. Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR (UK);2. Fakult?t für Chemie und Mineralogie, Wilhelm Ostwald Institut für Physikalische und Theoretische Chemie, Universit?t Leipzig, Linnéstrasse 2, 04103 Leipzig (Germany) |
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| Abstract: | Cobalt boryl complexes, which have only been sporadically reported, can be accessed systematically with remarkable (but controllable) variation in the nature of the M? B bond. Complexes incorporating a very strong trans σ‐donor display unparalleled inertness, reflected in retention of the M? B bond even in the presence of extremely strong acid. By contrast, the use of the strong π‐acceptor CO in the trans position, results in significant Co? B elongation and to labilization of the boryl ligand via unprecedented CO migratory insertion. Such chemistry provides a pathway for the generation of coordinative unsaturation, thereby enabling ligand substitution and/or substrate assimilation. Alkene functionalization by boryl transfer, a well‐known reaction for noble metals such as Rh or Pt, can thus be effected by an 18‐electron base‐metal complex. |
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| Keywords: | boron boryl ligands carbonyl ligands cobalt insertion reactions |
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