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Browsing Department of Chemistry (ETDs) by Author "Prof. D.B.G. Williams"

Browsing Department of Chemistry (ETDs) by Author "Prof. D.B.G. Williams"

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  • Lawton, Michelle Claire (2005)
    Lewis acids play an important role in catalysis; they are associated with mild conditions, high selectivities and unique reactivities. Traditional Lewis acids such as AlCb and BF3 successfully catalyse such well known ...
  • Cullen, Adam (2012-05-23)
    The work described in this thesis was directed at advancing the applications of Al(OTf)3, a metal triflate, in organic synthesis. Lewis acids play an important role in catalysis and catalyse reactions with high selectivities, ...
  • Shaw, Megan Lorraine (2005)
    This study focused on the synthesis and evaluation of phosphine ligands with multiple functional ities. Polar ligands suitable for use in homogeneous catalysis in aqueous/organic systems were synthesised, as were ligands ...
  • Hughes, Tanya (2009-01)
    The objective of the project described in this dissertation was the preparation of a range of bulky electron-rich phosphine ligands making use of the directed ortho metallation (DoM) methodology developed in our labs. ...
  • Tshivhase, Mmboneni Gifty (2012-05-23)
    Porphyrazines like porphyrins and phthalocyanines have unique physical, chemical and spectral properties. This allows them to have many impressive applications. They are less studied than phthalocyanines because of the ...
  • Bredenkamp, Tyler (2009)
    There were two main objectives of the research presented m this dissertation. Firstly, the synthesis of bulky electron withdrawing phosphine-alkene ligands for classic ligand testing in the Suzuki cross-coupling reaction ...
  • Kotze, Philippus Daniel Riekert (2008-01)
    The main objective of the research described in this dissertation was to prepare a range of triaryl phosphine ligands having systematically changing stereo-electronic properties using Grignard reagents and P-Cl derivatives. ...
  • Hughes, Tanya (2012-05-23)
    The focus of this study was placed on developing stable recyclable catalyst systems that are both active and selective in Pd-catalysed reactions such as the Suzuki-Miyaura cross-coupling reaction, and the methoxycarbonylation ...
  • Lawton, Michelle Claire (2009-06)
    The research described in this thesis was directed at advancing the application of metal triflates, Al(OTf)3 in particular, in organic synthesis, on the one hand and to contribute to the understanding of the underlying ...
  • Shaw, Megan Lorraine (2011)
    This study initially focused on the synthesis of a set of triaryl phosphine ligands, encompassing a broad range of electron withdrawing functionalities on the ortho-position of one of the aryl rings. These varying moieties ...
  • Netshiozwi, T. E. (2009)
    The main objective of the research described in this dissertation was the preparation and characterisation of hindered organophosphorus compounds. For this purpose, ionic and free radical mechanisms were applied in the ...

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