Electronic Theses and Dissertations

Date of Award


Document Type


Degree Name

Ph.D. in Chemistry


Chemistry and Biochemistry

First Advisor

Thedford K. Hollis

Second Advisor

Daniel Mattern

Third Advisor

Mitchell A. Avery

Relational Format



The previously reported amine elimination methodology for the metalation of CCC-NHC pincer ligand precursors has been extended to other early-transition metals and ligands. Specifically, synthetic results for the preparation of imidazole based CCC-NHC pincer Ti (IV), CCC-NHC pincer Ta (V) will be discussed. In addition, the synthesis of a new triazole based CCC-NHC pincer ligand precursor and its metalation with Ta (V) will be presented. Coordination sphere manipulation of the new pincer complexes using TMSCl for the Ti complex and lithium t-butylamide for the Ta complexes is also discussed. The reaction of the initial Ta CCC-NHC complex with lithium t-butylamide is of particular interest as it is the first X-ray crystallographically determined molecular structure of an early-transtion metal anionic N-heterocyclic carbine complex. Catalytic results in hydroamination/cyclization with the Ti complexes and oxidative amination using the Ta complexes will also be reported.

Included in

Chemistry Commons



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