Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 18 of 18 for “"CPFE"”.
-
Bond Formation Reactions to Phosphorus Using an Electrophilic Phosphinidene Complex
… reactivity of a cationic phosphinidene complex [CpFe(CO)2{PNiPr2}]+ (Cp = η5-cyclopentadienyl, iPr = isopropyl), toward bond activation, cycloaddition and nucleophilic addition has been examined. The complex [CpFe(CO)2{PNiPr2}]+ reacts with primary, secondary, and tertiary silanes to form the …
-
The synthesis, reactivity and application of functionalized alkyl transition metal complexes
… In Chapter 1, the bromohexyl iron complex, [CpFe(C0)2{(CH2) 0Br}] has been prepared and new information on electrochemical and thermal behaviour of (CpFe(C0)2{(CH2) 6Br}] has been obtained from cyclic voltammetry and differential scanning calorimetry respectively. The chemical reactivity of …
-
Ontogeny of contextual fear conditioning: behavioral, neuropharmacological and molecular mechanisms
… the context preexposure facilitation effect (CPFE). The CPFE is a variant of contextual fear conditioning in which acquisition of the contextual representation (preexposure phase) and association of the retrieved contextual memory with an immediate foot-shock (training phase) are separated by …
-
The synthesis and reactivity of functionalised alkyl transition metal complexes
The complexes [CpFe(CO)₂CH₂X] and [CpW(CO)₃CH₂X] (Cp = n⁵-C₅H₅; X=Cl, Br, I) have been prepared and their reactivity with a series of tertiary phosphines, amines, SMe₂ and AsPh₃ in THF, CH₃CN and MeOH has been investigated. Two types of cationic products, namely the ylide complexes [CpM(CO)nCH₂L]+ …
-
Photochemistry of cyclopentadienyliron(II) arene complexes and tetraorganoborate salts
The photodearylation mechanism of (CpFe(ArH)) $\sp{+}$X$\sp{-}$ was studied. Irradiation of either the free ion or the ion pair in solution containing benzonitrile (PhCN) leads to a loss of the arene ligand and formation of a tris-nitrile complex ( (CpFe(PhCN)$\sb3\rbrack\sp{+}$). Two important …
-
Electrochemical behaviour of some organometallic compounds containing iron and molybdenum
… of some mononuclear alkyl compounds of the types CpFe(CO)₂(CH₂)nCH₃ (n = 0 to 11, Cp = η-C₅H₅), CpMo(CO)₃(CH₂)nCH₃ (n = 3,4,17) have been investigated in aprotic solvents. The cyclic voltammograms obtained for all the iron alkyl compounds suggest similar behaviour after the initial oxidation. The …
-
High-Resolution Characterization of Micro-Scale Crack Tip Fields in Zirconium
… with crystal plasticity-based finite element (CPFE) analysis for the facture studies. The current dissertation is presented in a manuscript format. Chapters I to III include the Introduction, Literature Review, and Experimental Details. In Chapter IV, localized geometrically necessary …
-
Synthesis, characterisation and reactivity studies of μ(α, ω)-alkanediyl complexes of ruthenium, iron and cobalt
… has been synthesised by the reaction of [CpFe(CO)₂(CH₂)₄I] with Na[CpRu(CO)₂] and characterised by all the above mentioned techniques.
-
The synthesis, characterization and metathesis reactivity of compounds (with at least one pendant alkene group) of iron, ruthenium and iridium
… (iii) bis(alkenyl) acyl complexes of the type CpFe(CO){C(O)(CH2)nCH=CH2}{PPh2(CH2)mCH=CH2} (n = 3 - 4, m = 3, 4 and 6), 62 - 65.
-
The synthesis and reactivity of binuclear μ-hydrocarbyl complexes of some transition metals
… for example the reactivity of the compounds [CpFe(CO)₂]₂{μ-(CH₂)n} with nucleophiles such as tertiary phosphines and isocyanides, yield diacyl compounds of the type [CpFe(CO)L]₂{μ-CO(CH₂)nCO} (Cp = C₅H₄Me or C₅Me₅) and (L = tertiary phosphine or isocyanide). Similar ligand induced CO insertion …
-
Synthesis, spectroscopy, and electrochemistry of hydrogenase mimics
… H2ase model complexes. Lastly, the synthesis of CpFeNi complexes is investigated as a route to higher oxidation mixed-valence CpFe(III)Ni(II) complexes. Piano-stool FeCp(CO) complexes lead to stable mixed-valence CpFe(III)Ni(II). However, these complexes are coordinatively saturated and …
-
Multiscale In-Situ Characterization of Crystal Orientation, Temperature, and Microstructure Effects on Creep Defromation of Pure Magnesium and Mg-Al-RE Alloys
… (EBSD), and crystal plasticity finite element (CPFE) simulations. Together, these enabled orientation-sensitive analysis of creep behavior and links between microstructure and bulk creep response. The first part of the thesis investigates orientation effects in pure Mg via spherical indentation, …
-
The Effects of Lipopolysaccharide-induced Neuroinflammation on Learning and Forgetting in Juvenile Rats
… preexposure facilitation effect</em> (CPFE) procedure. LPS is an endotoxin that activates the immune system and reduces neurogenesis in the process. Rats exposed to a context at 24 days of age and shocked, after a 22 day retention interval showed less freezing the next day than those …
-
The synthesis, structure and chemistry of some novel organometallic dendrimers
… crystal structures of a dendritic precursor, [CpFe(CO)₂(CH₂)₃Br] (space group P2₁/c) and first generation ruthenium dendritic wedge (space group Cc) have been determined at low temperature. Calculated molecular structures were generated with the HYPERCHEM(TM) program; the dendritic wedges are …
-
Aspects of group 14 element - transition metal cluster chemistry
… react with [Ph₃PAu]⁺ or [CpNi(CO)]₂, but with CpFe(CO)₂I yielded Co₄(CO)₁₂, CpFeCo(CO)₆ and [GeCo₇(CO)₂₀]⁻ (characterised by infrared spectroscopy and FABS mass spectroscopy). The electrochemistry of clusters containing trigonal pyrimidal and spiro μ₄-EM₄ groups has been investigated using …
-
Darstellung, Reaktivität und Struktur von Mono- und Di-Manganiophosphonium Salzen sowie Lewis-Säure-Base-Addukte von Ferraten mit metallorganischen Lewissäuren
… muß. Aus 3 läßt sich durch Metallierung mit CpFe(CO)2Cl auch ein bisher unbekanntes heterodimetalliertes Ferriomanganiophosphonium-Salz in Form von 8 synthetisieren. Die für die Darstellung von Diferriophosphonium-Salzen gängige Silylmethode aus FpCl und Ph2PSiMe3 läßt sich nicht auf Mangan …
-
Alkane Elimination Reactions between Transition Metal Hydrides and Rare-Earth Alkyls
… by the use of Rp and Fp fragments (Fp = [CpFe(CO)2], Rp = [CpRu(CO)2]) in metal-metal bonding the reactivity of [HW(CO)3Cp] towards yttrium alkyls was examined. The relatively high acidity of the metal-hydrogen bond should allow alkane elimination reactions. Indeed, reactions of …
-
Role of Nudt21 Mediated Alternative Polyadenylation and Hyaluronan In The Development of Pulmonary Hypertension
<p>Pulmonary hypertension (PH) is a progressive disease with serious effects on quality of life and life expectancy of patients. PH is a complex disease that likely develops due to multiple influences, and no curative treatments exist for this disease. It has been shown that alternative …