PXP pincer ligands based on a diaryl-element core unit have been widely explored for many central donor atoms X = C, N, O, P, Si, Sb, etc.  This presentation will describe our success in preparation of the corresponding boryl/bis(phosphine) PBP complexes of group 9 metals.  A boryl donor is arguably the strongest trans-influence X-type ligand that can be incorporated into a pincer framework.  In addition, the diarylboryl site possesses an empty orbital that can give rise to Lewis acidic non-innocent behavior of this pincer, accepting an external Lewis base or a ligand from the metal center.  We will discuss the synthesis and characterization of PBP complexes, and especially the many possible interconversions among boryl, borane, and borate forms of the central boron donor site.

New boryl-centered pincer ligands and their complexes

251st National Meeting (2016)

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