Early transition metal complexes supported by PNP ligands

INOR 218

Oleg V. Ozerov, ozerov@brandeis.edu1, Emily Pelton2, Laura Gerber1, Wei Weng1, Sean R. Parkin3, and Bruce M. Foxman1. (1) Department of Chemistry, Brandeis University, MS 015, Brandeis University, 415 South St., Waltham, MA 02454, (2) Department of Chemistry, Gustavus Adolphus College, 800 West College Avenue, Saint Peter, MN 56082, (3) Department of Chemistry, University of Kentucky, 15 Chemistry-Physics Bldg, Lexington, KY 40506-0055
Rigid PNP pincer ligands based on the diarylamido backbone are remarkably robust as scaffolds for a series of unusual early transition metal complexes. In particular, PNP ligands have been shown to allow isolation and characterization of a variety of complexes of group 4 and 5 metals with multiple metal-carbon bonds. This presentation will communicate the latest results in the chemistry of PNP complexes of tantalum and hafnium. We will discuss the synthetic issues of the installation of the PNP ligands onto early transition metals, synthesis and characterization of metal alkylidene complexes and approaches to metal alkylidyne complexes.