CHED Irvin Levy, Carmen Gauthier, Nicole Snyder  Monday, April 8, 2013 

682 - Systematic modification of electron density on a series of tungsten based Lewis acid catalysts with minimal structural changes

Molly Kingsley,, James Chambers, Richard Hartmann. Department of Chemistry and Biochemistry, Nazareth College of Rochester, Rochester, New York 14618, United States

The results of recent experiments in our group have shown that tungsten compounds (WCl6 and WCl4(PPh3)2) are successful Lewis acid catalysts in the methylation of oleic acid. While it is clear the oxidation state of tungsten influences the rate of reaction, we are unsure of its specific role because both structural and electronic changes were made. In an attempt to investigate the sole effect of electronic changes, we have systematically synthesized a group of compounds of the general formula: WCl4(PPh3-X)2 (X = H, F, Cl, O-CH3, and CH3, all in the para position). These compounds present a scenario where no appreciable change to the structure has been made, yet the electron density of tungsten is influenced from afar. We report here the synthesis, and characterization of these compounds along with a 1H NMR study of their ability to catalyze the methylation of oleic acid.

Monday, April 8, 2013 12:00 PM
Undergraduate Research Posters (12:00 PM - 02:30 PM)
Location: Morial Convention Center
Room: Hall D


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