AEI 65 |
| In order to better understand the mechanisms of zinc CO2-polymerization catalysts, a series of simple, monomeric alkylaminozinc Zn(CH3)2(HNR2)2 complexes were designed that insert CO2 at the Zn-N bond. All complexes were synthesized in an anhydrous, nitrogen atmosphere and characterized by NMR, FTIR, elemental analysis and x-ray crystallography. Stoichiometric additions of CO2 resulted in the identification of several new carbamatozinc complexes on the pathway to the final product Zn4O(O2CNR2)6. The kinetics of CO2 addition were monitored by a stop-flow FTIR system that measured the concentration of free CO2 in solution. The kinetic data suggests that the mechanism of CO2 insertion proceeds through a rare pentacoordinate zinc intermediate which may be essential for CO2-polymerization catalysts. |
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Academic Employment Initiative
8:00 PM-10:00 PM, Monday, August 20, 2007 BCEC -- Exhibit Hall - B2, Sci-Mix
Academic Employment Initiative |