Zirconium-Cobalt Heterobimetallic Complexes: Synthesis and Analysis of Reactivity Toward the Activation of Small Molecules

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dc.contributor.advisor Thomas, Christine en_US
dc.contributor.author Greenwood, Bennett P.
dc.date.accessioned 2011-05-23T19:45:35Z
dc.date.available 2011-05-23T19:45:35Z
dc.date.issued 2011
dc.identifier.uri http://hdl.handle.net/10192/24383
dc.description.abstract Heterobimetallic complexes containing an early transition metal directly interacting with a late transition metal have been shown to have various degrees of reactivity with small molecules. The differences in the electron donating and receiving abilities between the two metals and the ligand substituents coordinated cause the M-M interaction to be highly polarized, which in turn allows tuning of the potentials required to reduce the complexes. Our group has synthesized Zr-Co heterobimetallic species containing phosphinoamide ligands, which we have shown to reduce at potentials ~1 V more positive than their analogous homometallic species. The 2 electron reduction of the synthesized complexes induced the coordination of a N2(g) adduct on the terminal end of the Co center. Due to the stabilization imparted by the phosphinoamide ligands the shortest early/late heterobimetallic interatomic distance has been produced along with the stabilization of an unprecedented open axial coordination site around a trigonal pyramidal Zr geometry. The species were found to be highly reactive toward small molecules especially CO2, showing the ability to activate and cleave one of the C—O bond producing a bridging µ-O and a terminal CO. This research shows promise in the use of CO2 as a feedstock for synthesis and more specifically the design of a catalytic cycle for the rWGS reaction. en_US
dc.description.sponsorship Brandeis University, Graduate School of Arts and Sciences en_US
dc.format.mimetype application/pdf en_US
dc.language English en_US
dc.language.iso eng en_US
dc.publisher Brandeis University en_US
dc.rights Copyright by Bennett P. Greenwood 2011 en_US
dc.title Zirconium-Cobalt Heterobimetallic Complexes: Synthesis and Analysis of Reactivity Toward the Activation of Small Molecules en_US
dc.type Thesis en_US
dc.contributor.department Department of Chemistry en_US
dc.degree.name MS en_US
dc.degree.level Masters en_US
dc.degree.discipline Chemistry en_US
dc.degree.grantor Brandeis University, Graduate School of Arts and Sciences en_US


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