In the aim of preparing thermally robust organometallic complexes of rare earth metals, we recently synthesized a family of monoanionic pincer ligands comprised of phosphinimine donors attached to a carbazole core. Although these ligands support a variety of unusual species, many of the organometallic complexes have proven prone to diverse cyclometalation processes. In an effort to circumvent such decomposition pathways, our ligand platform systematically developed into two incarnations: one has replaced carbazole with a pyrrole core and the other features pyrazole, rather than phosphinimine donors. Several series of thermally stable rare earth organometallic and hydride complexes of these ligands have been synthesized. The evolution of the design of these pincer ligands, as well as the reaction chemistry of the corresponding organometallic complexes, will be discussed in detail.

Carbazole and pyrrole-based pincer platforms for supporting lutetium alkyl and hydride complexes

247th National Meeting (2014)

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