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dc.contributor.authorSingstad, Åsmundeng
dc.date.accessioned2010-08-19T12:15:05Z
dc.date.available2010-08-19T12:15:05Z
dc.date.issued2010-06-01eng
dc.date.submitted2010-05-31eng
dc.identifier.urihttp://hdl.handle.net/1956/4032
dc.description.abstractThe present Master thesis seeks to develop new unsymmetrical ruthenium-based olefin metathesis catalysts and therein a better understanding of olefin metathesis catalysis with unsymmetrical active complexes. Such catalysts have a potential for chemoselectivity and in best case, stereoselectivity. Two different classes of catalysts, coordinated by a hemilabile amine ligand and by a novel N-heterocyclic carbene (NHC) ligand respectively, have been investigated. Two new amine-based olefin metathesis catalysts have been synthesized and tested. In addition, quantum chemical calculations to study the catalysts were performed to give a better knowledge about their behaviour in catalytic olefin metathesis. Prior to the main calculations a validation study was performed to identify the most accurate and effective method of optimizing geometries. The catalysts are shown to be temperature dependent catalysts (latent catalysts) with high thermal stability, which makes them interesting for some industrial applications. The results from the experiments and the calculations are combined to give a better understanding of the catalyst and their properties. However, the analysis of the results for the amine-based catalysts, suggests a limited potential for E/Z-stereoselectivity. To explore a different potentially stereoselective design, a novel sterically demanding bidentate NHC ligand was synthesized. Unfortunately, any attempt to synthesize a corresponding olefin metathesis failed. Instead, we succeeded to synthesize a novel iridium(I) complex containing the novel bidentate NHC ligand. The iridium complex could have potential for catalytic hydrogenation by further adjustments.en
dc.format.extent11119741 byteseng
dc.format.mimetypeapplication/pdfeng
dc.language.isoengeng
dc.publisherThe University of Bergeneng
dc.subjectOlefin metathesiseng
dc.subjectIridiumeng
dc.subjectNHCeng
dc.subjectAmineeng
dc.subjectLigandeng
dc.titleDesign and Synthesis of Ruthenium based Olefin Metathesis Catalystseng
dc.typeMaster thesiseng
dc.type.degreeMasternob
dc.type.courseKJEM399eng
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Kjemi: 440nob
dc.subject.nsiVDP::Matematikk og Naturvitenskap: 400::Kjemi: 440::Uorganisk kjemi: 442nob
dc.subject.archivecodeMastergradeng
dc.subject.nus752299eng
dc.type.programMAMN-KJEMeng
dc.rights.holderCopyright the author. All rights reserved
dc.rights.holderThe authoreng


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