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Gold–boron (con)fusion: Addition of an anionic metalloborylene to an [AuCl(N-heterocyclic carbene)] complex results in attack of the boron atom at the gold center and formation of a trimetallic Mn2AuB framework (see scheme, middle). X-ray structural analysis and DFT calculations show that the bonding situation of this complex cannot be described by the “boryl” (pure boron donor) or “borane” (pure boron acceptor) descriptions.
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Braunschweig et al. (2009) studied this question.
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