This presentation will highlight our work on the development of a new class of ligands that contain two pincer cores covalently linked via one of the side-arm donors.  We will report on the preparation and synthesis of new ligands containing two PCS, PCN, PNN, or PNS tridentate pincer cores.  The installation of two metal centers into the pincer clefts generally proceeds analogously to mono-pincer analogs.  The ligands are constructed in such a way that either the nature of the inter-pincer linker, or the steric bulk of the substituents on the phosphine donor prevent close approach of the two metal centers.  Our investigations target exploration of the reactivity in which the two metal centers can interact with the same substrate, but potentially in different and complementary ways.  We are particularly focused on the potential for hydrogenation of oxygenated organic molecules.  The wide array of metal/ligand combinations lends itself to many possible reactivity pathways, including ligand non-innocence.

Bis(pincer) ligands and their late metal complexes for new avenues of reactivity

246th National Meeting (2013)

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