Browsing All Electronic Theses and Dissertations by Title
Now showing items 4142-4161 of 4518
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Synthesis, electrochemical, kinetic and thermodynamic properties of new ferrocene-containing betadiketonato rhodium(I) complexes with biomedical applications
(University of the Free State, 2002-11)English: Synthetic routes to prepare new ferrocene-containing β-diketones, FcCOCH2COR, with Fc = ferrocenyl, R = H, CH3, CH2CH3, CH(CH3)2 and C(CH3)3, have been developed. Rhodium complexes of the type [Rh(FcCOCHCOR)(cod)] ... -
Synthesis, electrochemical, kinetic and thermodynamic studies of new ruthenocene-containing betadiketonato rhodium(I) complexes with biomedical applications
(University of the Free State, 2004-05)English: New ruthenocene-containing β -diketones 1-Ruthenocenyl-4,4,4,-trifluorobutan-1,3-dione [Hrctfa, pKa / = 7.31(3)], 1-ruthenocenylbutan-1,3-dione [Hrca, pKa / = 10.22(4)] 1-ruthenocenyl-3- phenylpropan-1,3-dione ... -
Synthesis, electrochemistry and density functional theory calculations on chrome and cobalt carbene and betadiketonato complexes
(University of the Free State, 2014)English: Two series of metal(β-diketonato)3 complexes were synthesized: tris(β-diketonato)chromium(III) complexes (where β-diketonato = [R1COCHCOR2]- = acac, ba, dbm, tfba, tfth, tffu, tfaa, hfaa) and tris(β-diketonato)cobalt(III) ... -
Synthesis, electrochemistry, kinetics and density functional theory calculations on imino and thenoyl-bidentate complexes of rhodium
(University of the Free State, 2015)English: In this study L,L’-BID ligands were synthesized where the L and L’ coordinating atoms were varied between O, NH and NPh. The ligands were (CH3COCHCOHCH3) (Hacac), (CH3COCHCNH2CH3) (1a), (CH3COCHCNHPhCH3) (1b), ... -
Synthesis, kinetic and computational chemistry of thiopene-containing beta-diketonato complexes of rhodium(I) and rhodium(III)
(University of the Free State, 2007-01)English: Thienyl-containing β-diketones of the type ThCOCH2COR, with R = Th (Hdtm), C6H5 (Hbth), have been prepared. The group electronegativity of the thienyl group is 2.107 (Gordy scale) as inferred from a linear methyl ... -
Synthesis, structural aspects and electrochemistry of ferrocene-containing betadiketonato titanium(IV) complexes with biomedical applications
(University of the Free State, 2006-05)English: In this study ferrocene-containing β-diketones of the type [FcCOCH2COR] where R = Ph, CH3, CF3, Fc and Rc (Fc = ferrocenyl and Rc = ruthenocenyl) and β-diketonato titanium(IV) complexes of the type [Cp2Ti(FcCO ... -
Synthesis, substitution kinetics and electrochemistry of betadiketonato titanium and titanocene complexes with biomedical applications
(University of the Free State, 2003-11)English: Synthetic routes to prepare 13 new and 11 known complexes of the metals Ti, Zr, Hf and V with one bichelating ligands have been developed and optimised. A variety bi-chelating titanocenyl(IV) complexes of the form ... -
Synthesis, substitution kinetics, electrochemistry and phase studies of long-chain alkylated ferrocene-containing rhodium(I) complexes with biomedical applications
(University of the Free State, 2006-09)English: New alkylferrocene-containing β-diketones of the type (Cp-R)-Fe-(Cp-COCH2COCH3), where R = C9H19, C10H21, C12H25, C14H29 and C18H37 as well as (Cp)-Fe-(R-Cp-COCH2COCH3), (Cp-R)-Fe- (R-Cp-COCH2COCH3) and ... -
Synthetic, electrochemical and kinetic studies of phosphinites and their rhodium(I) complexes
(University of the Free State, 2015-06-24)English: Organophosphorus ligands of the type, C6H5XPPh2, where X = O, S and NH, meta- and para-Ph2POC6H4OPPh2, were synthesised by the reaction between chlorophenylphosphine and the desired phenyl substituent in the ... -
A synthetic, electrochemical and kinetic study of polysiloxane-bound rhodium carbonyl complexes
(University of the Free State, 2012)English: Two ferrocene-containing β-diketonato ligands, FcCOCH2COR, as well as their dicarbonyl rhodium(I) complexes, [Rh(FcCOCHCOR)(CO)2], were synthesized. Chloro/bromo functionalized polysiloxanes of the type ... -
Synthetic, electrochemical and structural aspects of ß-diketonato and carboxylate complexes of aluminium
(University of the Free State, 2008)English: A series of ferrocene-containing tris-β-diketonato aluminium(III) complexes of the form Al(FcCOCHCOR)3 (R = CF3, CH3, C6H5, Fc with Fc = ferrocenyl) were synthesized and subjected to structural and electrochemical ... -
Synthetic, kinetic and electrochemical aspects of betadiketonato titanium(IV) complexes
(University of the Free State, 2007-03)English: In this study, phenyl-containing β-diketones, phenyl-containing and biphen-containing titanium(IV) complexes were synthesised. Seven of these compounds are new and five are previously reported complexes. The ... -
Synthetic, kinetic and electrochemical aspects of ferrocene- and ruthenocene-containing titanium(IV) complexes with biomedical applications
(University of the Free State, 2005-11)English: In this study, ruthenocene-containing β-diketones, ruthenocene-, cobalticenium- and/or ferrocene- containing enaminones and ruthenocenyl and/or ferrocenyl containing titanium(IV) complexes were synthesised. Forty ... -
Synthetic, kinetic and electrochemical studies on new osmocene-containing betadiketonato rhodium(I) complexes with biomedical applications
(University of the Free State, 2006-06)Afrikaans: Nuwe osmoseen-bevattende β-diketone, 1-osmocenyl-4,4,4-trifluorobutan-1,3-dione [Hoctfa, pKa/= 7.90(2)], 3, 1-osmocenylbutane-1,3-dione [Hoca, pKa/= 10.39(3)], 4,1-osmocenyl-3-phenylpropane-1,3-dione [Hbocm, ... -
A system for drought monitoring and severity assessment
(University of the Free State, 1995-02)English: The objectives of this study were: (i) to develop a near real-time crop-specific drought monitoring system that delimits drought stricken areas and assesses the severity of droughts in these areas, (ii) to ... -
Systematic review of dietary interventions in autism spectrum disorder
(University of the Free State, 2013-02)English: Background: Autism spectrum disorders (ASD) are an ever-increasing group of neurobiological developmental disorders, affecting every aspect of the affected individual’s life. As a heterogeneous disorder of which ... -
Systematics of Crabbea Harv. (Acanthaceae) in southern Africa
(University of the Free State, 2017-01)The purpose of this study is to provide an updated taxonomic revision and a molecular phylogenetic investigation of Crabbea Harv. (Acanthaceae) in southern Africa. The taxonomic component of this study entailed a detailed ... -
The systematics of the genus Garuleum cass. (Asteraceae)
(University of the Free State, 2013)English: The aim of this study is to provide a taxonomic revision and molecular phylogenetic analysis of the eight Garuleum Cass. (Asteraceae) species of southern Africa. The taxonomic revision resulted in the construction ... -
Systematics of the shoot fly subgenus atherigona s. str. (diptera: muscidae) of South Africa
(University of the Free State, 2014-07)English: Atherigona Rondani, 1856, is considered one of the most speciose genera of Muscidae, with 131 species presently known from the Afrotropical Region. The genus has been studied by numerous taxonomists since the ... -
Sythesis, electrochemistry, phase studies and computational chemistry of gamma-substituted betadiketonato-carbonyl complexes of rhodium(I)
(University of the Free State, 2014-07)English: Synthetic routes to prepare β-substituted and γ-substituted β-diketones, rhodium(I)dicarbonyl and rhodium(I)monocarbonyltriphosphine complexes were developed and optimised, All complexes were characterised with ...