New nickel complexes for trifluoromethylation studies

M.S. University of Hawaii at Manoa 2012.Includes bibliographical references.We decided to prepare bis-perfluoroalkyl nickel complexes bearing a bipyridine ligand for investigation of the fundamental nickel perfluoroalkyl chemistry and reductive elimination of perfluoroethylene. Moreover, we envisioned a new precursor for investigation of Ar-CF3 reductive elimination. We have successfully demonstrated the syntheses of [(dtbpy)Ni(CF3)2] and [(dtbpy)Ni(CF2CF3)2] in moderate yields. The key intermediate nickel complex, [(tmeda)Ni(CF3)Br] allowed for the preparation of new complexes in good yields

Linear Bis(perfluoroalkyl) Complexes of Nickel Bipyridine

Three new complexes were prepared: [(dtbpy)­Ni­(CF₃)₂] (<b>1</b>), [(dtbpy)­Ni­(CF₂CF₃)₂] (<b>2</b>), and [(dtbpy)­Ni­(CH₃)₂] (<b>3</b>) (dtbpy = 4,4′-di-<i>tert</i>-butyl-2,2′-bipyridine). Remarkable differences in the structure, electronics, reactivity, and absorption of visible light for the alkyl versus perfluoroalkyl complexes were observed and are detailed in this report