Due to its steric bulk, weak coordinative ability, and inertness, the carba-closo-dodecaborate anion is a promising ligand substituent for transition-metal catalysis.  Recently dianionic N-heterocyclic Carbenes, featuring two N-bound hydrido-carborane substituents were reported. Here we describe the synthesis and coordination chemistry of related NHCs, featuring polyhalogenated N-carboranyl groups. The complexes formed with these NHCs are more stable and more reactive than the previously reported hydrido species.

Polyhalogenated carborane substituted N-heterocyclic carbenes

248th National Meeting (2014)

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