Дисертації з теми "Phosphene"
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Deerenberg, Sirik. "Stereogenic phosphorus containing phosphine-phosphite ligands in asymmetric catalysis." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2000. http://dare.uva.nl/document/57171.
Повний текст джерелаPassays, Johan. "Nouveaux ligands mixtes de type phosphore / carbène N-hétérocyclique : synthèse et applications en catalyse asymétrique." Thesis, Rouen, INSA, 2011. http://www.theses.fr/2011ISAM0008.
Повний текст джерелаA straightforward method for the preparation of new bidentate ligands containing aphosphine or a phosphite and a carbene function was developed. Different phosphorus-imidazolium compounds were prepared according to this method. First, diphenylphosphine-NHC ligands featuring a stereogenic center a to the phosphine were synthesized from b-hydroxyesters. This strategy was then extended to the preparation of phosphite-imidazoliumand dialkylphosphine-imidazolium compounds. Complexation of these phosphorus-NHCligands with different metals like Ir or Rh was performed in order to study there catalytic properties in asymmetric hydrogenation
Phung, Quang Linh. "Synthèse de ligands chiraux de type phosphine-phosphite et phosphine-carbène N-hétérocyclique pour la catalyse asymétrique." Rouen, 2005. http://www.theses.fr/2005ROUES033.
Повний текст джерелаCatalytic asymmetric synthesis using organometallic reagents has become one of the most active areas of research in modern organic synthesis. To achieve the highest levels of reactivity and selectivity in catalytic enantioselective reactions, several reactions parameters must be optimized. Among them, the selection and design of the chiral ligand is perhaps the most crucial step. We have developed two families of bidentate ligands : phosphine-phosphite and phosphine N-heterocyclic carbene. These two series of ligands have a chiral center to the α-position next to the phosphine moiety. This stereogenic α-position could be of great importance since the phosphorus atom is directly associated with the transition metal in the asymmetric reaction. Phosphine-phosphite ligands were tested in the Rh-catayzed asymmetric hydrogenation (ee up to 84%) and hydroformylation (no asymmetric induction). Phosphine N-heterocyclic carbene ligands were tested in the Ir-catalyzed asymmetric hydrogenation and hydrosilylation (no asymmetric induction), and with promising results in the Suzuki-Miyaura cross-coupling reaction
Klüpfel, Bernd. "P-chirale funktionelle Phosphane durch Hydrophosphinierung mit kationischen Phosphan-Eisenkomplexen." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=966083458.
Повний текст джерелаJavierre, Guilhem. "Understand the inversion mechanism of P-stereogenic compound using kinetic studies and in silico modeling." Thesis, Ecole centrale de Marseille, 2018. http://www.theses.fr/2018ECDM0001/document.
Повний текст джерелаThis thesis is about the racemization of alkyl hydrogeno-phenylphosphinate, a molecule centered on a stereogenic phosphorus atom. We have synthetized compounds of interest, and studied their kinetic of racemization with chiral HPLC and phosphorus NMR. The first theoretical study (SMD//M06-2X/6-31++G**) about the enantiomerization of alkyl phosphinate after an SN2 with an alcohol have shown that the most favored mechanism was a syn-addition of the alcohol onto the double bond P=O on the opposite side of the alkoxy group. Kinetic studies with ethyl phosphinate in ethanol under reflux have shown an inversion barrier around 135 kJ.mol-1, in excellent agreement with this model (136 kJ.mol-1). The addition of a basic compound during kinetic measurements has shown a decreasing of the barrier to 121.5 kJ.mol-1, showing a catalytic effect. Kinetic and theoretical models have suggested that the mechanism would go through an activation of the alcohol by the basic compound which would facilitate its addition. The first tests about the nature of the alkyl group of phosphinate and alcohol have shown a general dependency of the barrier with the hindrance, but some DFT models, especially with adamantyl, have been in disagreement with this hypothesis
Alcaraz, Gilles. "Espèces déficientes en électrons et cycles tendus alpha-phosphorés." Toulouse 3, 1995. http://www.theses.fr/1995TOU30126.
Повний текст джерелаSchmidt, Anette. "Phosphide und Phosphate des Cobalts Kristallisation, Thermodynamik, Strukturen und Farben /." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965185273.
Повний текст джерелаHarrison, Mark Anthony. "EXPOSURE TO PHOSPHINE GAS DURING APPLICATION OF MAGNESIUM PHOSPHIDE IN STORED PRODUCT WAREHOUSES." VCU Scholars Compass, 1990. http://scholarscompass.vcu.edu/etd/4909.
Повний текст джерелаTohme, Ayham. "Synthèse et étude de phosphines organométalliques électrocommutables pour la catalyse." Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S012/document.
Повний текст джерелаDuring this work, we have synthesized and characterized new metalloligands bearing redox-active organometallic end-groups. Switching the redox state of the latter should modify the electronic properties of the studied metalloligands. Once these are complexed to a metal, this should induce a change of the metal’s electronic density, which results ideally in a change of its catalytic activity. First, we studied triarylphosphine ligands bearing one or three organoiron end-groups. Four of these metalloligands were fully characterized in both their reduced and oxidized states, and their electronic parameters were evaluated using two different experimental methods. Later on, corresponding Pd(II) complexes were also synthesized and their catalytic preformances were tested. In the second part of this work, organometallic Fe(II) alkynyldiarylphosphine derivatives were synthesized. Upon oxidation, the resulting species was found to be unstable, leading to the formation of dicationic bis-acetylide Fe(II) complexes, that were isolated and characterized. The dimerization process was inhibited either by sequestration of the electronic lone pair of the phosphorus atom, or by controlling the steric hindrance around that center. Finally, corresponding precatalysts were synthesized and, upon the oxidation of the metalloligands, they were found to be fairly stable compounds. Some of these complexes were also tested in a catalytic transformation
Mocanu, Olivia. "Phosphole and phosphepine-based π-systems : synthesis, reactivity and physical properties". Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S166.
Повний текст джерелаThis manuscript describes the synthesis and characterisation of new heterocyclic π-conjugated systems built around the phosphorus atom. Firstly, an introduction to the phosphole chemistry (synthesis methods and integration into π-conjugated systems) is presented. The chapter I describes the synthesis and physico-chemical properties of pyrene functionalised either by a phosphole or silole ring. The synthesis of these new structures was achieved by using a transition-metal catalysis. Two types of regioisomers were synthesised in order to study the effect of the heteroatom (P or Si) on the optical and electrochemical properties together with the impact on the solid-state organisation. The chapter II describes the synthesis and the physical properties of the first phosphole-based Ir(III) ortho-metallated complexes. The presence of two stereogenic centres in the complex induced diastereoselectivity issues that could be solved by carefully choosing the reaction conditions. Furthermore, it was demonstrated that the nature of the ligands can tune the optical and the redox properties. The chapter III describes the use of P-containing seven-membered rings (phosphepines) for the development of new π-conjugated systems. Two original π-systems have been synthesised and studied: (i) phosphepine based PAH and (ii) dithieno-phosphepines. The optical and redox properties have been investigated and discussed in the manuscript
李慧敏 and Huai-min Li. "Photochemical studies of binuclear platinum and rhodium complexes withbridging isocyanide, phosphite and phosphine ligands." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1989. http://hub.hku.hk/bib/B31231603.
Повний текст джерелаSwor, Charles D. (Charles David) 1982. "Synthesis, coordination chemistry, and reactivity of functionalized phosphines: Toward water-soluble macrocyclic phosphine complexes." Thesis, University of Oregon, 2011. http://hdl.handle.net/1794/11264.
Повний текст джерелаMacrocyclic phosphine compounds have long been sought as ligands for transition metal complexes because of their strong binding properties. Despite considerable effort in this field, no general methods for synthesizing phosphine macrocycles or their complexes have been developed. This dissertation describes attempts to synthesize an iron complex with a water-soluble macrocyclic tetraphosphine ligand for use in separating nitrogen from natural gas. Chapter I reviews previous syntheses of macrocyclic phosphine ligands and their complexes, focusing on ligand synthesis, coordination chemistry, and demetallation of the complexes. Chapter II reports on the synthesis of water-soluble secondary bidentate phosphine ligands, their coordination chemistry with iron(II), and attempts to use these complexes as templates for forming a macrocyclic iron-phosphine complex by reactions with carbon electrophiles. Over the course of treating these iron complexes with various carbon electrophiles, an interesting reaction between bromomaleic anhydride and proton sponge was discovered. Chapter III explores the product, 4-maleicanhydrido-1,8-bis-(dimethylamino)naphthalene (MAPS). Due to its conjugated donor-acceptor network, which is disrupted upon protonation, MAPS acts as a colorimetric version of a proton sponge. The attachment of MAPS to amine-functionalized solid supports, forming solid-supported proton sponge reagents, is also described. Chapter IV discusses the synthesis of an iron(II) complex of the water-soluble phosphine 1,2-bis(di(hydroxymethyl)phosphino)ethane (DHMPE). Although unbound hydroxymethylphosphines commonly react with NH-functional amines via the phosphorus Mannich reaction, this and other complexes of DHMPE do not undergo this reaction. Further investigation with hydroxymethylphosphine-boranes suggests that the currently-accepted mechanism of the phosphorus Mannich reaction is incorrect, and an alternate mechanism is proposed. Chapter V discusses the synthesis and functionalization of copper(I) complexes of water-soluble phosphines. Unlike the complexes described in Chapter I, these complexes readily react with α,ω-dihalides or di(acyl chloride)s, forming complexes whose mass spectra correspond to those with macrocyclic phosphine ligands. Unlike most macrocyclic tetraphosphine complexes, these complexes can be demetallated by treatment with sulfide. Finally, a new synthesis of water-soluble macrocycles, based on lessons learned during the course of these investigations, is proposed. This dissertation includes previously published and unpublished co-authored material.
Committee in charge: Dr. Michael M. Haley, Chairperson; Dr. David R. Tyler, Advisor; Dr. Darren W. Johnson, Member; Dr. Shih-Yuan Liu, Member; Dr. Mark H. Reed, Outside Member
Wilkening, Ina [Verfasser]. "Synthesis of phosphin-, phosphon- and phosphoramidates by Staudinger reactions / Ina Wilkening." Berlin : Freie Universität Berlin, 2012. http://d-nb.info/103029108X/34.
Повний текст джерелаNjel, Christian. "Suivi de la formation d’un film de type polyphosphazène sur InP dans l’ammoniac liquide (- 55°C) : Couplage électrochimie / XPS." Thesis, Versailles-St Quentin en Yvelines, 2015. http://www.theses.fr/2015VERS006V/document.
Повний текст джерелаIndium phosphide (InP) is a III-V semiconductor, which represents an ideal candidate for optoelectronic applications. However, its spontaneous oxidation in air leads to the loss of its electrical properties. The surface passivation becomes a key step for its integration in attractive optoelectronic devices. As part of this thesis, we are interested in studying the passivation of the InP surface by nitridation. We reproducibly realized the formation of a polyphosphazene-like (H2N-P=NH)n film on InP by electrochemical treatment in liquid ammonia (-55°C). The monitoring of the film formation was performed using a systematic coupling between electrochemical measurements (J = f(E), J = f(t), E = f(t), and C = f(E)) and XPS analysis (X-ray photoelectron spectroscopy) to follow the chemical composition of the surface. These techniques provide some answers about the nitridation mechanism of InP surface by a wet process (anodization in NH3 liq), leading to the formation of the phosphazene film through an ECE mechanism “Electrochemical-Chemical-Electrochemical”. The study of the air ageing of the modified surface using XPS analysis revealed the protective nature of the film. The high value of the interfacial capacity after the anodic treatment suggests that the modified interface (Electrolyte-Insulator-Semiconductor-like) is in accumulation state and behaves like a "real" capacitor
Le, Thanh Dung. "Les ligands amidines N-phosphorées : synthèse, structure, réactivité, coordination et catalyse." Toulouse 3, 2008. http://thesesups.ups-tlse.fr/811/.
Повний текст джерелаThis thesis deals with the preparation, the reactivity, the coordination chemistry and the use of N-phosphorus amidine ligands in the Suzuki-Miyaura catalytic reaction. First, we have developped a straightforward synthesis of a new family of monodentate and bidentate ligands, the N-phosphinoformamidines (R' = H) and the N-phosphinoamidines (R' =/ H) R"2N-C(R')=N-PR2. Then, an unprecedented study regarding the reactivity of these compounds towards Brönsted et Lewis acids was carried out. Theoretical calculations enabled us to rationalize our experimental results. Finally, the coordination chemistry of these monodentate and bidentate ligands, N-phosphorus amidines, with various palladium(II) precursors was studied and we have showed the potential of our ligands in the catalytic Suzuki-Miyaura coupling reaction between boronic acid and p-bromoanisol in the presence of palladium(II)
Djiele, Ngameni Patrice. "Phosphane and Phosphite Silver(I) Complexes: Synthesis, Reaction Chemistry and their Use as CVD Precursors." Doctoral thesis, [S.l. : s.n.], 2005. http://archiv.tu-chemnitz.de/pub/2005/0008.
Повний текст джерелаHoriuti, Toshihide. "Studies on Enantioselective Addition to C=C Bonds Catalyzed by Transition Metal-Phosphine-Phosphite Complexes." Kyoto University, 1997. http://hdl.handle.net/2433/202317.
Повний текст джерелаLi, Huai-min. "Photochemical studies of binuclear platinum and rhodium complexes with bridging isocyanide, phosphite and phosphine ligands /." [Hong Kong] : University of Hong Kong, 1989. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12428541.
Повний текст джерелаNijland, Aike. "On Tris(hydroxymethyl)phosphine-mimicking Non symmetrical Bis(phosphines) in Coordination Chemistry, Catalysis, and Cytotoxity." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX003.
Повний текст джерелаThe non-symmetrical bis(phosphine) Ph2P(CH2)2¬P(CH2OH)2 was designed and synthesized as a mimic of tris(hydroxymethyl)phoshine; this structure is appealing for use in transition metal catalysis but is known to show unpredictable reactivity in transition metal coordination spheres. Having a hydroxymethylphosphine connected to a conventional diphenylphosphine donor with an ethane-1,2-diyl bridge should provide increased stability through the chelate effect and thus better-defined coordination complexes. To obtain data concerning the origin of the undesired acitivity of hydroxymethylphosphines, we also synthesized aprotic bis(methoxy) and aminomethylphosphine and cyclic dihydroxyphosphinane analogues of the non-symmetrical bis(phosphine). These bis(phosphines) have been used to form coordination complexes with a number of transition metals (Co(II), Ni(II), Ru(II), Rh(I), Pd(II), and Pt(II)). Significant hydrogen bonding influence on stereochemistry were observed and some arguments regarding hydroxymethylphosphine coordination in the literature were refuted. A selection of the complexes has also been shown to possess significant cytotoxic activity against a human cancer cell line. The ligands have also been employed successfully as ligands in two catalytic systems, viz. RhI catalysed hydrogenation and group 10 metal catalysed hydrophosphination of formaldehyde
Sampson, Jacqueline Marie. "The extent of phosporus redox chemistry in west central Florida waters." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4939.
Повний текст джерелаChoujaa, Abdelkrim. "Passivation de la surface de InP par phosphore et arsenic : contribution à l'étude du transistor MISFET-InP." Lyon 1, 1989. http://www.theses.fr/1989LYO10016.
Повний текст джерелаKeller, Michel. "Synthèses et applications de nouveaux catalyseurs dendritiques phosphorés." Toulouse 3, 2012. http://thesesups.ups-tlse.fr/1745/.
Повний текст джерелаThis PhD-thesis deals with the general field of catalysis and more particularly the use of catalysts and ligands supported on phosphorous dendrimers. The latters are branched macromolecules whose structure and size are perfectly controlled during the synthesis. In comparison with their monomeric analogues, dendritic catalysts allow some modifications of the catalyst physical properties (solubility, size, geometry) while keeping their chemical properties (catalytic activity). The immobilization of catalysts onto dendrimers displays the possibility of their recycling with specific techniques such as precipitation, which cannot be applied in absence of support. Furthermore, the catalytic activities can be modified (positive and negative dendritic effect). In this PhD-thesis, we focused on three types of catalysts: transition metal-based complexes, rare earth-based catalysts and organocatalysts. First, the ability of supported phosphine-palladium based catalysts to promote the Suzuki coupling was studied. Although a negative dendritic effect was observed (decrease of the dendrimer catalyst activity in comparison with the monomeric counterpart), good yields were obtained and the catalyst recycling could be achieved by precipitation. Moreover, the use of dendritic catalysts allows to retain the palladium on the support and thus to dramatically reduce the metal leaching in the coupling products. In addition, the grafting of similar dendrons on magnetic nanoparticles enabled to increase the number of consecutive runs using magnetic decantation as recycling technique. In a second part, dendritic terpyridines were prepared and then complexed to rare earth (mainly Sc, Yb and Y). The ability of these complexes to promote Friedel-Crafts acylation was investigated and the recycling of these efficient catalysts was successfully accomplished. Finally, dendritic prolinol-based organocatalysts have allowed to perform asymmetric Michael reaction in mild conditions, with good yields and enantioselectivity. A positive dendritic effect was observed and efficient recycling conditions were proposed. This PhD-thesis displays a wide range of applications for dendrimers in the field of catalysis. One of the major advantages presented is the set-up of recyclings by exploiting the nanometric size or the magnetic properties of the support. Thus, these studies are in line with the general concept of sustainable development insofar as eco-compatible catalysts are used
Daccache, Bernard. "Etude sur la déprotonation en epsilon du phosphore des oxydes de phosphine dienologues : nouvel accès au réactif de Wittig-Horner : nouvelle voie de synthèse stéréo sélective d'une ylure de Wittig-Horner précurseur du cycle a du 1s,25 dihydroxycholecalciferol." Paris 6, 1990. http://www.theses.fr/1990PA066738.
Повний текст джерелаPhilippon, David. "Lubrification par la phase gazeuse : tribochimie des additifs phosphorés et boratés." Phd thesis, Ecole Centrale de Lyon, 2007. http://tel.archives-ouvertes.fr/tel-00280892.
Повний текст джерелаGodinot, Claire. "Absorption et devenir du phosphore au sein de la symbiose corallienne." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00829443.
Повний текст джерелаPope, Simon Johnathan Albert. "Syntheses and studies on transition metal complexes involving phosphine ligands towards the syntheses of macrocyclic phosphines." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302349.
Повний текст джерелаVaghi, L. "DESIGN, SYNTHESIS AND APPLICATION OF NEW MONO- AND MULTI-DENTATE CHIRAL LIGANDS WITH DONOR PHOSPHOROUS FOR ASYMMETRIC HOMOGENEOUS CATALYSIS." Doctoral thesis, Università degli Studi di Milano, 2012. http://hdl.handle.net/2434/167822.
Повний текст джерелаCieślikiewicz-Bouet, Monika. "Synthesis, structural investigations and evaluation of pyrazine sensitizers for lanthanides emitting in near-infrared and novel phosphine derivatives." Thesis, Orléans, 2012. http://www.theses.fr/2012ORLE2088.
Повний текст джерелаOn account of the ubiquity of nitrogen heterocycles and their biological properties, the great attention is paid to developing methodologies of their synthesis and functionalization. For this purpose, the study of functionalization of enamides constitutes an important topic due to the utility of these motifs in the construction of complex heterocyclic derivatives. Palladium-catalyzed reactions of cross- coupling are rapid and efficient methods of choice for synthesis of enamides particularly starting from enol phosphates derived from lactams, imides or amides. The first chapter of the thesis evokes the original C-P coupling reaction of chiral and achiral secondary phosphine boranes with different enol phosphates in mild reaction conditions, leading to corresponding enamido-phosphine boranes. This methodology permits the construction of libraries of novels phosphines. Also, the reaction of nucleophilic addition of phosphide anions onto various enecarbamates acyclic was elaborated, giving an access to original beta-phosphino alpha-amino acids, bearing the quaternary carbon on alpha position to nitrogen. The second chapter is devoted to the preparation and characterization of organic chromophores based on the pyrazinic core, which are likely to exhibit the fluorescence properties. These compounds were designed to form new sensitizing systems for lanthanide cations and could be used as organic sensitizers for molecular imaging in near infrared
Daghetta, M. A. A. "USE OF POLIPHOSPHANES IN THE ASSEMBLY OF DISCRETE OR POLYMERIC COORDINATION COMPOUNDS." Doctoral thesis, Università degli Studi di Milano, 2010. http://hdl.handle.net/2434/155259.
Повний текст джерелаKeller, Jan. "Phosphane." Diss., Ludwig-Maximilians-Universität München, 2007. http://nbn-resolving.de/urn:nbn:de:bvb:19-157902.
Повний текст джерелаAuckland, Clare. "The dilution of phosphite in rapidly growing plants and how soil and plant phosphate levels interact with phosphite and its ability to control Phytophthora cinnamomi." Thesis, Auckland, Clare (2002) The dilution of phosphite in rapidly growing plants and how soil and plant phosphate levels interact with phosphite and its ability to control Phytophthora cinnamomi. Honours thesis, Murdoch University, 2002. https://researchrepository.murdoch.edu.au/id/eprint/32633/.
Повний текст джерелаFuente, Molina Verònica de la. "Ligand design for palladium and iridium selective catalysts." Doctoral thesis, Universitat Rovira i Virgili, 2011. http://hdl.handle.net/10803/34766.
Повний текст джерелаGatignol, Jérémie. "Catalyses au Cuivre et au Fer : Outils Efficaces pour la Formation de Liaisons C-P." Caen, 2013. http://www.theses.fr/2013CAEN2005.
Повний текст джерелаThis thesis was devoted to the development of new and environmental friendly catalytic systems for the synthesis of C-P bonds. First, a general and effective synthetic method was developed based on the copper-catalyzed cross-coupling reaction of differently functionalized bromobutadienes and various secondary phosphines (diaryl, dialkyl- and alkylaryl), diphenylphosphine oxide or H-phosphonates. This method provides a straightforward access to butadienylphosphines with different steric and electronic properties as well as butadienylphosphine oxides and butadienylphosphonates in good yields. These two last families were engaged in chemoselective reduction reaction to obtain a complementary access to butadienylphosphines and an unprecedented route to functionalized primary butadienylphosphines. Finally, the first regioselective and efficient iron-catalyzed hydrophosphination reaction of alkenes was developed, offering for the first time a regioselective entry either to anti-Markovnikov or Markovnikov adducts according to the oxidation state of the iron salts, FeCl2 or FeCl3
Mouchet, Patrick. "Synthèse de polyoxydes de polyphosphines, extractants d'actinides." Montpellier 2, 1994. http://www.theses.fr/1994MON20237.
Повний текст джерелаEichenseher, Sandra. "Rhenium-containing phosphines and phosphine oxides new design strategies for highly active and, or enantioselective organometallic catalysts for organic synthesis /." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975727532.
Повний текст джерелаWaechtler, Thomas, Yingzhong Shen, Alexander Jakob, Ramona Ecke, Stefan E. Schulz, Lars Wittenbecher, Hans-Josef Sterzel, et al. "Evaluation of Phosphite and Phosphane Stabilized Copper(I) Trifluoroacetates as Precursors for the Metal-Organic Chemical Vapor Deposition of Copper." Universitätsbibliothek Chemnitz, 2006. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200600315.
Повний текст джерелаRoth, Nina. "Kupfer- und Ruthenium-Precursoren: Synthese, Charakterisierung und deren Verwendung zur Abscheidung metallischer Schichten nach dem CVD-Verfahren." Doctoral thesis, Universitätsbibliothek Chemnitz, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200901579.
Повний текст джерелаGün, Hülya [Verfasser], Walter [Gutachter] Frank, and Christian [Gutachter] Ganter. "Untersuchungen zur Reaktivität von ausgewählten Phosphanen und Phospheten gegenüber Lewis-Säuren / Hülya Gün ; Gutachter: Walter Frank, Christian Ganter." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2017. http://d-nb.info/1143899083/34.
Повний текст джерелаAdams, Julian James. "A C₂-symmetric analogue of dppf : synthesis and characterization of indenyl-phosphines, phosphino-ferroindacenes and their coordination compounds." Thesis, University of Canterbury. Chemistry, 1998. http://hdl.handle.net/10092/7564.
Повний текст джерелаVirieux, Heloise. "Nanocristaux luminescents de phosphures d'indium et de zinc : synthèse, enrobage et caractérisation." Thesis, Toulouse, INSA, 2013. http://www.theses.fr/2013ISAT0030/document.
Повний текст джерелаRésumé de la thèse en anglais : This PhD investigation focuses on organometallic synthesis of indium phosphide (InP), zinc phosphide (Zn3P2) colloidal semiconductor nanoparticles (NPs) and core/shell structures which were obtained by the growth of a layer of zinc sulfide (ZnS) on the surface. The objectives are to understand and control the synthesis in order to shift the absorption and emission wavelengths to the near infra-red range, interesting for biomedical imaging.The first chapter presents the state of the art on the InP and InP/ZnS nanocrystals (NCx). A brief recall on the physical and chemical properties of semiconductor NCx is presented and various syntheses are described. Particular attention was paid to the size of NCx, the shift of the fluorescence emission to higher wavelengths and the optimization of quantum yields. The potential of these objects for white light emitting diodes (LED) or biomedical imaging shows the value added of using InP/ZnS NCx rather than other materials based on toxic elements such as cadmium, lead elements…The second chapter focuses on a synthesis from indium carboxylates known in the literature. The goal is to characterize the structure of NPs to understand the procedure of the synthesis and the coating. Measurements by Nuclear Magnetic Resonance (NMR) in solid state and Photoelectronic X-ray spectroscopy (XPS) revealed the oxidation of InP of the NPs. This oxide layer increases during the coating. This originates from a decarboxylating coupling of carboxylic acids at high temperature in the presence of NPs. This oxidation is believed to inhibit the growth of the object, which restricts the attainable range of wavelengths.The third chapter provides a novel synthesis from indium amidinate instead of indium carboxylate. The advantage of this approach is the potential to lower significantly the reaction temperature (150°C instead of 280°C) and to avoid secondary decarboxylation reaction. A coating with ZnS at low temperature (150°C) is also developed. The synthesis of InP NPs also causes an oxidation of the surface. A coupling takes place again between the ligands, palmitic acid and hexadecylamine providing new oxidizing conditions. The study of different ratios of ligands shows that when the reaction medium is modified, the InP NPs do not exhibit a conclusive luminescence response. Synthesis and coating are carried out under an atmosphere of hydrogen (H2) in Fisher-Porter reactor in order to counter these oxidizing conditions. NPs with diameters of the order of 3,4 nm (a necessary condition to approach the infra-red emission) and a quantum yield of 18-20% are thus obtained. These had never been observed before during this thesis.The last chapter is devoted to an exploratory study on Zn3P2 NPs. Zinc phosphide is a promising material because of non-toxic and abundant constituents, and potential access to near infra-red wavelengths. Different synthesis parameters are studied and the structural and optical properties are characterized. Preliminary results on the coating show instabilities of the Zn3P2 NPs. The use of trioctylphoshine oxide (TOPO) appears to allow the passivation of the NPs in the air and a better stability is possible under an atmosphere of H2
Chavagnan, Thierry. "Resorcinarenic phosphines and iminophosphoranes for catalysis : formation of capsular complexes." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAF023/document.
Повний текст джерелаThis thesis describes the synthesis of three types of phosphorus-containing resorcinarene cavitand: a) compounds with diphenylphosphino groups grafted to the wider rim of a generic cavity. These phosphines undergo facile, directed C–O bond breaking upon reaction with transition metal ions in the presence of exogenous or endogenous nucleophiles. A nickel complex of this type was shown suitable for the low pressure production of short α-olefins starting from ethylene; b) cavitands distally-substituted by two iminophosphoranyl groups (–Ph2P=NAr). One of them (Ar = p-anisyl), when combined with Rh(I), resulted in a shape-selective olefin hydrogenation catalyst; 3) double phosphino-cavitands, which upon chelation gave metallo-capsular complexes in which the metal centre is either fully or partially embedded in the resulting cavity. A platinum complex of this type resulted in the selective hydroformylation of styrene into the expected branched aldehyde
Gonschorowsky, Miriam. "Beiträge zur Chemie hydrophiler Phosphane." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973540788.
Повний текст джерелаNickel, Thomas. "Neue Synthesen chiraler und polar funktionalisierter Phosphanliganden." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=963282336.
Повний текст джерелаCuevas-Chávez, Cynthia. "Synthèse, structure et réactivité de complexes de platine et d'iridium à ligands phosphinodi(benzylsilanes)." Thesis, Toulouse 3, 2019. http://www.theses.fr/2019TOU30196.
Повний текст джерелаThe rich chemistry and applicability in such a wide range of fields (e.g. small molecule activation, selective transformations including catalytic developments, etc.) of silicon based pincer-like compounds with transition metals has been witnessed by the remarkable advances in coordination chemistry as well as in organometallics. This is due to the outstanding properties of Si atoms which generate electron rich metal centres concomitantly labilizing trans substituents. However, despite all the plethora of arrangements of such species throughout the literature (e.g. framework, number and nature of anchoring points), metal derivatives with polydentate ligands incorporating two silicon atoms are limited as is the study of their reactivity. Therefore, this thesis presents the synthesis, structure and reactivity of novel Platinum and Iridium complexes supported by the "SiPSi" pincer-type ligand. Interestingly, the square-planar PtII complex of formula trans-[(SiPSi)Pt(PPh3)] (SiPSi = P(o-C6H4CH2SiMe2)2Ph) reversibly reacts with small molecules, H2 and CO, forming the corresponding dihydride and dicarbonyl 18-electron species, respectively. On the other hand, the dimeric complex [Ir(SiPSi)(µ-Cl)]2 dissociates in benzene solution to yield the 14-electron monomeric species [Ir(SiPSi)Cl] which readily reacts with two electron donors. 16- and 18-electron configurations are obtained depending mainly on sterics in the case of P-derivatives. Different dispositions of L ligands on 18-electron species (L = CNCD3, CO) and isomerisation processes were also evidenced. Moreover, even if iridium is prone to perform oxidative additions, we also showed that Si-H agostic bonding can favour C-H activation of an adjacent acidic methylene group leading to a tetradentate ligation
Delattre, Vincent. "Phosphines photo-commutables : synthèse et applications en catalyse." Thesis, université Paris-Saclay, 2022. http://www.theses.fr/2022UPASF018.
Повний текст джерелаThe field of organic synthesis has been influenced by the development of more and more efficient catalysts, capable of carrying out complex reactions with high conversion rates and high selectivity. Currently, the scientific community is focusing on the developement of catalytic systems whose activity can be modulated in a reversible way under the effect of external stimuli. Irradiation, in particular, appears to be an ideal stimulus, as it is non-invasive, highly selective and easy to apply. In this context, and in the line with the current research topics of our team, we have developed new photoswitchable catalysts, and we have evaluated their catalytic activity. The synthesis of a phosphine dioxide with a dithienylethene backbone was first achieved. This novel compound displaying a phenanthrene spacer between the phosphorus function and the photoswitchable framework was then converted, in two steps, into a bimetallic gold complex, whose catalytic activity was evaluated in an intramolecular hydroamination reaction. This study allowed us to demonstrate that the two forms of the catalyst generated under irradiation display different catalytic behaviour. In parallel, we have developed a new family of photoswitchable phosphines based on the triazonine backbone. Triazonines are cyclic azobenzenes displaying exceptional stability in their E and Z configurations. The functionalization of this backbone with halogenated functions has allowed access to wide a range of phosphorus compounds with great potential as photoswitchable ligands and organocatalysts
Monforte, Pascal. "Composés phosphorés hypercoordonnés. Etude structurale et réactivité." Montpellier 2, 1994. http://www.theses.fr/1994MON20114.
Повний текст джерелаEl, Harouch Yamna. "Applications des complexes zirconocènes et des hétéroéléments en synthèse organique et organométallique." Toulouse 3, 2004. http://www.theses.fr/2004TOU30216.
Повний текст джерелаThe first chapter is the development object bibliographical of the various aspects of the synthesis, structure and reactivity of amidins. The second chapter describes the réductif coupling of acetylenic Ph2P-Co̱C-SiMe3 and Me2N-Co̱C-Ph with the benzyne zirconocene and/or the complex irconacyclopropane. The structure of the complexes zirconocenes obtained in the various reactions of coupling highlight the major role of the steric and electronic properties of the groupings silyle, phosphino, and amino. The third chapter relates to the synthesis of the zirconiés a-diazoi͏̈ques complexes with reaction of azazirconaindenes with the compounds of the type HC(N2)R. The study of the reactivity of these complexes with respect to various reagents was approached. The final chapter is devoted to the synthesis and the study of the reactivity of N-phosphinoformamidines R2N-CH=N-PR'2. The nature of the products which result from the addition of different electrophiles on R2N-CH=N-PR'2 depends largely on the R' groupings. According to the temperature and polarity of the reactional medium, we observed a process "isomerism of enchaînement", after addition of R2PCl on the formamidines
Wang, Chang-Sheng. "Selective catalytic C(sp²)–H and C(sp³)–H bond functionalizations for the synthesis of phosphorus and nitrogen containing molecules." Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1S106/document.
Повний текст джерелаIn the first chapter, we have developed an efficient approach for the fast modification of arylphosphine oxides using ruthenium(II)-catalyzed C–H bond functionalization with alkenes. Interestingly, we have found that the selectivity of the reaction, namely alkylation versus alkenylation, is depending on the reaction pH. The reduction of the phosphine oxide allows the formation of aryl phosphines bearing a flexible pendent carboxylate. In the second objective, a copper-catalyzed oxidative C(sp3)–H/N–H coupling of NH-heterocycles with affordable (cyclo)alkanes was developed. This protocol involved C(sp3)–N bond formation via a radical pathway generated by a homolytic cleavage of di-tert-butyl peroxide and trapping of the radical(s) by copper catalyst.In a third part, benzylic C(sp3)–H acyloxylation of 2-alkylpyridine, 2-alkylpyrazine and 2-alkylthiazole compounds was achieved using simple aldehydes via a copper-catalyzed tandem reaction, involving oxidative esterification followed by O-atom transfer. Finally, pyridin-2-ylmethyl tosylate derivatives are obtained in high yields from 2-alkylpyridine N-oxides via a [3,3]-sigmatropic rearrangement of the adduct between 2-alkylpridine N-oxides with benzenesolfonyl chlorides. Moreover, alkylnitrones also underwant [3,3]-sigmatropic rearrangement to give α-tosylated ketones after hydrolysis
Defoort, Françoise. "Etude thermodynamique et expérimentale du dépôt chimique en phase vapeur du phosphure d'indium." Grenoble INPG, 1986. http://www.theses.fr/1986INPG0126.
Повний текст джерелаOba, Boussou Gabriel. "Phosphine-boranes. Cyclométallation stéréosélective et résolution dynamique." Toulouse 3, 2000. http://www.theses.fr/2000TOU30148.
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