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dc.contributor.supervisor Hayes, Michael
dc.contributor.author Wheaton, Craig Andrew
dc.date.accessioned 2012-08-15T16:56:58Z
dc.date.available 2012-08-15T16:56:58Z
dc.date.issued 2011
dc.identifier.uri https://hdl.handle.net/10133/3108
dc.description xxiv, 254 leaves : ill. ; 29 cm + 1 CD-ROM en_US
dc.description.abstract The thesis outlines the development of novel cationic zinc complexes for application in lactide polymerization catalysis. These complexes were characterized spectroscopically and crystallographically, and where appropriate their efficacy as catalysts for the polymerization of lactide was evaluated. The strongly donating, neutral chelating ligands employed in this study were prepared by installation of either one or two phosphinimine donors on a dibenzofuran backbone. An efficient synthetic methodology was then developed for the synthesis of cationic complexes of the formula [LZnE+][BAr4-], wherein E = C2H5, CH3, Ph, C6F5, OAc, OC6F5, or methyl-(D,L)-lactate, and AR = Ph, C6F5, or m-(CF3)2-C6H3. Only the cationic zinc-lactate species were found to be highly active polymerization catalysts. Tuning of the steric and electronic properties of the ligand resulted in the discovery of zinc-lactate systems that promote rapid and well-controlled polymerization of lactide under mild conditions, marking the first well-defined cationic metal catalysts to do so. en_US
dc.language.iso en_US en_US
dc.publisher Lethbridge, Alta. : University of Lethbridge, Dept. of Chemistry and Biochemistry, 2011 en_US
dc.relation.ispartofseries Thesis (University of Lethbridge. Faculty of Arts and Science) en_US
dc.subject Zinc compounds en_US
dc.subject Polymerization -- Research en_US
dc.subject Metal catalysts -- Research en_US
dc.subject Complex compounds en_US
dc.subject Coordination compounds en_US
dc.subject Dissertations, Academic en_US
dc.title The development of cationic zinc complexes as a new class of lactide polymerization catalyst en_US
dc.type Thesis en_US
dc.publisher.faculty Arts and Science en_US
dc.publisher.department Department of Chemistry and Biochemistry en_US


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