Download or read book High valent Perfluoronickelacycles written by Nicole Marie Hunter and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorocarbons (FCs) and their derivatives (FCDs) are heavily relied on due to their wide range of uses (e.g. solvents, surfactants, refrigerants, and pharmaceuticals). Currently, FCs and FCDs are produced on an industrial scale via energy-intensive processes, using hazardous materials. Hence, new catalytic chemical technologies are required to provide cleaner and greener synthetic routes to partially fluorinated materials. The exploration of fundamental organofluorometallic chemistry of base metals, such as nickel, has potential to advance the development of novel catalytic processes towards this end. It has been established previously that zero-valent nickel complexes have the ability to efficiently catalyze the hydrodimerization of polyfluoroalkenes. The reactivity of the intermediate polyfluoronickelacycles was found to be influenced by modifications in the ligand sphere. Furthermore, an increase in oxidation state of the central metal atom was proposed as an additional strategy to increase the reactivity of the M-RF bond. In this thesis, through variation of the ligand environment and oxidation state of nickel, we have further developed the chemistry of high-valent polyfluoronickelacycles. Synthesis and characterization (NMR, EPR, UV/Vis, IR spectroscopy and electrochemistry) of new trivalent polyfluoronickelacycles are described as well as attempts to generate the corresponding tetravalent cations. Attempts to induce nucleophilic insertion of acetonitrile into the Ni-RF bond were also investigated herein. Challenges were encountered with the isolation of the tetravalent cations due to decomposition to the corresponding divalent nickelacycle.

Download or read book Eyes of a Stranger written by Rachel Ann Nunes and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: On the first day of her new life, Tawnia McKnight finds herself in Oregon, her fifth state in ten years. Another new job, new friends, a heartache left far behind. Maybe in Portland she can at last find what she is looking for. Maybe she can even forget Bret Winn. But when a tragic bridge collapse rocks the city, Tawnia is thrust back into the life of the man she thought shed never see again. Bret introduces her to the eccentric Autumn Raina stranger with inexplicably familiar eyesand Tawnia finds herself drawn into a web of confusion and deceit. Autumns suffering over her missing father seems to be real, but there is much that cannot be explained. Will Tawnia find what she is looking for, or will everything she is beginning to care about slip once again from her grasp?