Browsing School of Chemistry and Physics by Title
Now showing items 294-313 of 700
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An investigation of ultra low frequency (ULF) pulsations using radar data and solar wind data.
(2010-09-10)An investigation of Ultra Low Frequency (ULF) pulsations was conducted using data -
Investigations in dienamine chemistry.
(1991)Reaction of the pyrrolidine dienamines of ~1,8a-2-octalones with methyl vinyl ketone is complex. In methanol as solvent, the reaction occurs primarily with the linear dienamine isomer and results in annulation of the ... -
Investigations into the reactions of enamines and imines.
(1990)The alkylation of 2-methylcyclohexanone imines using methyl acrylate has been investigated with a view to optimising the reaction conditions. The mechanism of this alkylation reaction has been investigated and it has been ... -
Investigations into the reactions of imines and enamines.
(1993)Recent work in our laboratory has led to a new synthesis of the 2-oxo-a8'&-hexahydroquinoline ring system. This involved the condensation of B-alkylaminopropanoates with 2-methylcyclohexanone. Further reactions of ... -
Ionospheric signatures of solar flares.
(2009)VLF waves propagate in the Earth-ionosphere waveguide (EIW). The EIW is bounded below by the surface of the Earth and above by the ionospheric D-region (50–90 km altitude). The conditions for wave propagation in the EIW ... -
Isolation and characterisation of antibacterial agents produced by soil bacterium V3.
(2006)Actinomycetes are bacteria belonging to the order of Actinomyceteles and are -
Isolation and characterisation of secondary metabolites of two asteraceae species, Artemisia afra and Elytropappus rhinocerotis.
(2009)In this study two medicinal plant species, namely Artemisia afra Jacq. ex. Willd and Elytropappus rhinocerotis Less. (L.f) (= Dicerotamnus rhinocerotis Koekemoer), both belonging to the family Asteraceae, have been ... -
Isolation and characterization of cytotoxic compounds from Anthosperum hispidulum and Eriocephalus tenuifolius.
(2008)Cancer is a human tragedy that strikes and kills the lives of our beloved people. With a limited number of effective anticancer drugs from natural resources currently in use, there is a real need for new, safe, cheap and ... -
Isolation and identification of antidiabetic compounds from brachylaena discolor DC.
(2017)Abstract available in PDF file. -
Isolation and identification of novel compounds from indigenous plants.
(1993)Abstract available in pdf file. -
The isolation, structure elucidation and biological testing of compounds from Plectranthus hadiensis.
(2010)Three diterpenes of the abietane class, 7b-acetoxy-6b-hydroxyroyleanone (I), 6b,7b- dihydroxyroyleanone (II) and ent-pimara-8(14),15-diene-3b,11a-diol (III) and three triterpenes, 2a,3a,19 -trihydroxyurs-12-en-28-oic ... -
Isothiocyanate ligand derivatives of platinum(II) terpyridines.
(2008)The novel compounds [Pt(trpy)(NCS)]SbF6 (1) and [Pt{4'-(Ph)trpy}(NCS)]SbF6 (2) where trpy = 2,2':6',2''-terpyridine, have been synthesised and characterised by means of elemental analysis, infrared and 1H NMR spectroscopy, ... -
Kinematics and dynamics of the elliptical galaxy NGC 5266.
(2005)In studies of triaxial elliptical galaxies, one of the least observationally studied phenomena is figure rotation. Figure rotation has important consequences for the orbital structure and could explain the survival of steep ... -
A kinetic and equilibrium study of rooibos tea infusions.
(1998)The total mineral ion concentration of Rooibos Tea was determined using ICP-OES. Significant concentrations of Na, K, Mg, Ca, P were found, and trace levels of Al, Fe, Mo, Sr, Zn, Ba, Cu and Pb detected. Protocatechuic ... -
A kinetic and mechanistic study into the substition behaviour of Plantinum (II) Polypyridyl complexes with a series of Azole Ligands.
(2010)A novel platinum(II) complex, [Pt{4-(o-tolyl)-6-(3˝-isoquinoyl)-2,2´-bipyridine}Cl]SbF6 (Pt4) was synthesized and characterised by means of infrared, elemental analysis, mass spectroscopy, and NMR spectroscopy. Substitution ... -
A kinetic and mechanistic study of cyclic amine functionalized platinum(II) complexes with bio-relevant nitrogen nucleophiles.
(2018)In this study, four square-planar platinum(II) complexes were synthesized namely C1S1, C2S1, C3S1 and C4S1. The novel platinum(II) complex (C4S1) was synthesized using methods detailed in Chapter 4 and characterized using ... -
A kinetic and mechanistic study of dinuclear platinum (II) complexes with bis-(4'-terpyridyl)-a,w-alkyldiol ligands.
(2012)A series of novel Bis 2,2':6',2″-terpyridinyl ligands, linked through a flexible alkyl chain situated at the 4' position, were synthesised and characterised by microanalysis, FTIR, NMR, UV-Visible spectroscopy, and MS-ToF. ... -
A kinetic and mechanistic study on the substitution behaviour of mononuclear and dinuclear platinum (II) complex.
(2013)Abstract available in PDF file. -
Kumada and liebeskind-srogl coupling of aryl thiosulfonates as electrophilic coupling partners in the synthesis of biaryls.
(2021)The need and desire for versatility and diversity in cross-coupling reactions was the drive for the studies conducted in this thesis. Traditionally, transition-metal catalyzed crosscoupling reactions have heavily relied ...