Tesis sobre el tema "Synthèse de diphosphines"
Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros
Consulte los 30 mejores tesis para su investigación sobre el tema "Synthèse de diphosphines".
Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.
También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.
Explore tesis sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.
Laborde, Coralie. "Synthèse de diphosphines et d'acides phosphiniques chiraux". Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20256.
Texto completoAtropisomeric diphosphine ligands play a crucial role in the synthesis of enantiopur molecules, particularly in pharmaceutical, agrochemical and flavors industries. Growing demand in asymmetric synthesis, impose to develop news ligands by rapid, economic and effective strategies of synthesis. This optically pure ligand was combined with multiples transition metal to form catalyst what will have used wide variety of entioselective reaction type.Over the past few years, a new family of ligands has emerged, possessing biheterocyclic skeleton and thus allowing the introduction of different steric and electronic interactions. We will report a efficient syntheses of the new atropisomeric five-membered heterocyclic diphosphines with original strategy of synthesis whose the main stages consist in a double heterocyclic construction. In the second part, we will develop an approach permitting to obtain atropochiral phosphonates with a similar strategy of synthesis from allenylphosphine oxides or allenylphosphonates as precursors
Siutkowski, Magali. "Diphosphines à phosphore asymétrique : Synthèse et évaluation en catalyse énantiosélective". Phd thesis, Ecole Polytechnique X, 2005. http://pastel.archives-ouvertes.fr/pastel-00001441.
Texto completoHajouji, Hassane. "Synthèse de diphosphines chirales à motifs phospholyle : applications en catalyse énantiosélective". Toulouse 3, 1992. http://www.theses.fr/1992TOU30191.
Texto completoCabou, Jérôme. "Synthèse d'une nouvelle classe de diphosphines ferrocéniques optiquement pures : utilisation en catalyse asymétrique". Lille 1, 2004. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2004/50376-2004-109-110.pdf.
Texto completoMadec, Jonathan. "Synthèse de nouvelles diphosphines et nouveaux phosphoramidites dissymétriques chiraux par atropoisomérie : étude de leurs propriétés en catalyse asymétrique". Phd thesis, Paris 6, 2004. http://pastel.archives-ouvertes.fr/pastel-00001086.
Texto completoFournier, Éric. "Synthèse et caractérisation de polymères organométalliques luminescents de cuivre(I) et d'argent(I) à base de diphosphines et diisocyanures". Mémoire, Université de Sherbrooke, 2003. http://savoirs.usherbrooke.ca/handle/11143/4620.
Texto completoMinois, Pauline. "Synthèse de mono et diphosphines dérivées d'amino acides ou de peptides, appliquées en chimie de coordination et pour le greffage de fullerène C60". Thesis, Dijon, 2013. http://www.theses.fr/2013DIJOS079/document.
Texto completoThe synthesis of secondary phosphine borane amino acids or dipeptides and their applications for the preparation of chiral ligands or for the grafting of fullerene, is described. These compounds were synthesized in good yield (up to 98%) without racemization. The principle of the synthesis is based on the alkylation of primary phosphine borane with a γ-iodo amino acid using phase transfer conditions. Tertiary diphosphine amino acids are obtained with 70% yield after a second alkylation. These compounds are one of the first examples of diphosphine grafted with a P-C bond on the side chain of amino acid. First of all, mono and diphosphine amino acid derivatives were used in asymmetric allylic substitution with palladium precursor or in asymmetric hydrogenation with rhodium precursor. In another hand, a cis platinum complex was synthesized with 60% yield from the diphosphine amino acid derivative. The cytotoxic properties of this complex were tested against human ovarian carcinogenic cell lines A2780. In the second part, the secondary phosphine borane amino acids and peptides have been used for grafting fullerene C60 by hydrophosphination using phase transfer conditions. The electrochemical study of the fullerene amino benzyl ester derivative has shown the cleavage of the P-C60 bond by electrolysis, affording the free fullerene and the secondary phosphine borane amino ester moiety. This work opens new perspectives for the chemistry of fullerene and phosphine derivatives of amino acids and peptides
Zwart, Guilhem. "Hydrogénolyse de (pseudo-)haloboranes et de chlorophosphines". Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASF049.
Texto completoThis thesis examines the challenges posed by uncertain access to chemical elements, exacerbated by a linear economic paradigm of their exploitation. The study focuses on boron and phosphorus, whose usage and recycling remain understudied. Boron, crucial in various industries, requires energy-intensive processes to be converted into active hydroboranes, used in fine chemistry. Two methods exist for their synthesis: the industrial method from borate, and the reaction of BCl₃ with a hydride donor. Using H₂ as a reducing agent could improve these processes. This research explores the synthesis of hydroboranes [9-BBN]₂ and [Cy₂BH]₂ from their halogenated and triflate derivatives, with a base and H₂. Base screening showed that trialkylamines, particularly NEt₃, are effective. The reaction relies on a frustrated Lewis pair mechanism to activate H₂. It was also found that dialkylboranes can catalyze the hydrogenolysis of other chloroboranes, particularly BCl₃, yielding HCl₂B· NEt₃ and H₂ClB·NEt₃. Finally, this strategy was extended to phosphorus, optimizing the hydrogenolysis of chlorophosphines into diphosphines. The method, effective for various substrates, proceeds in three steps : catalyst hydrogenolysis, hydride transfer, and base-assisted condensation into diphosphine. These transformations were modeled each time using density functional theory (DFT) and often present long reaction times (up to several days), but usually with good yields (> 70 %) under mild pressure and temperature conditions
Duprat, de Paule Sébastien. "Synthèse de nouvelles diphosphines chirales par atropoisomérie : utilisation en catalyse asymétrique et étude de l'influence des paramètres stériques et électroniques en hydrogénation asymétrique". Paris 6, 2002. http://www.theses.fr/2002PA066113.
Texto completoMotei, Rachid. "Nouveaux complexes de fer pour la modélisation du site actif des hydrogénases [FeFe] ou pour la commutation & Synthèse et caractérisation d'aminoesters isoxazoliniques". Thesis, Brest, 2017. http://www.theses.fr/2017BRES0160.
Texto completoIn the first part of this work, we realised a preliminary study to extend the series of dinuclear iron complexes [ Fe2(CO)4 (k2-P2N2) (μ-dithiolate)], including diphosphine ligands type P2N2, to complexes having an azadithiolate bridge, in order to study their behavior in acid medium and the role of different bases present in the second coordination sphere of these compounds. The new complexes [Fe2 (CO) 6 (k2-PPh2NR2) (μ -adtBn)] (R = Ph, Bn)) were obtained by reaction between the precursor [Fe2(CO)6(μ -adtBn)] and the cyclic diphosphines PPh 2NR2 (with R = Ph, Bn). These complexes have been spectroscopically and structurally characterized. We have also showed that the anion coordination modes (tcnsR)– in all these complexes are very different and affect, consequently, crystal lattices in a very important way. This suggests that the length of the alkyl chain of the anion (tcnsR)- should not be the only structural parameter affecting transition temperatures. The type of CN grouping (N3, N4, N5 or N6) involved in the coordination should then play an important role in the stacking of molecular entities in the crystal lattice as a result the intermolecular interaction, which are the origin of the spin transition characteristics (transition temperature, cooperativeness, ...), should be affected by the coordination mode of the anion.In the second part, we have realized the synthesis of our dipolarophile from serine and the preparation of dipoles (nitrile oxides). Their condensations with dehydroalanine allowed us to newly obtain isoxazolinic α-aminoesters. These novel isoxazolinic α-aminoesters were obtained in an accessible method, and under mild conditions by the 1,3-dipolar cycloaddition reaction. The obtained results prove the usefulness of this reaction as being a very efficient way to form new isoxazolines with good yields
Salomon, Christine. "Nouvelle synthèse stéréosélective de diphosphines à pont méthano P-stéréogéniques : applications en catalyse asymétrique et pour la préparation de clusters ou de polymères de coordination chiraux". Thesis, Dijon, 2010. http://www.theses.fr/2010DIJOS010/document.
Texto completoWe were interested in asymmetric synthesis of P-stereogenic methano bridged ligands and in their applications in asymmetric catalysis, coordination chemistry and in the preparation of coordination polymers of transition metals. P-stereogenic diphosphines were obtained highly stereoselectively by creation of a phosphorus-carbon bond on the methano bridge, starting from the anion formed in α position of methylphosphine borane. Several strategies were investigated, with the electrophiles varying from oxazaphospholidine borane complex, phosphinite borane, to chlorophosphine borane. The most stereoselective synthesis was obtained using chlorophosphine borane leading enantiomeric excesses up to 99%. Various methano bridge diphosphine diboranes, dissymmetric or C2-symmetric, bearing alkyl or aryl substituants (Me, OMe, Ph, o-An...), have been synthetised. The first chiral palladium clusters was prepared by reaction of the freshly decomplexed diphosphine with palladium acetate and trifluorocetic acid in water/acetone mixture under CO pressure. The palladium trimetallic center structure of the cluster was confirmed by X-ray analysis. Electrochemical properties and EPR analysis pointed out the formation of the first radical in highly structurated chiral environment. Preliminary studies of the chiral clusters in asymmetric Friedel Craft reaction were carried out, but lead to the product in a non-catalytic way and with no significant optical activity. The prepared chiral ligands were tested in asymmetric catalyzed hydrogenation, hydrosilylation, allylation and Diels Alder reaction using rhodium, palladium and silver derived catalysts and afforded low selectivities from 30 to 38% e.e. Nevertheless, the stereoselective syntheses of the diphosphine ligands elaborated in this work allow to pursue the optimisation of asymmetric catalysis by structural modifications. In the last chapter, P-stereogenic methano bridge diphosphines were used for the preparation of a new class of chiral coordination polymers derived from copper and silver. Photophysical studies and circular dichroism confirmed the 1-D structure and the optical properties of such polymers
Fiedler, Tobias [Verfasser] y John A. [Akademischer Betreuer] Gladysz. "Syntheses of Gyroscope-like Osmium Complexes and Cage-like Diphosphines = Synthese gyroskopartiger Osmiumkomplexe und käfigartiger Diphosphine / Tobias Fiedler. Betreuer: John A. Gladysz". Erlangen : Universitätsbibliothek der Universität Erlangen-Nürnberg, 2011. http://d-nb.info/1015475116/34.
Texto completoSTEPHAN, MASSOUD. "Synthese enantioselective de mono et diphosphines tertiaires". Paris 6, 1991. http://www.theses.fr/1991PA066345.
Texto completoLE, GOASTER CELINE. "Synthese asymetrique de nouvelles diphosphines fonctionnalisees et de bis-1,3-oxaphospholanes". Rennes 1, 1997. http://www.theses.fr/1997REN10163.
Texto completoMICHAUD, GUILLAUME. "Synthese de nouvelles diphosphines atropoisomeres dissymetriques caracteristiques et evaluation en hydrogenation asymetrique". Paris 6, 2001. http://www.theses.fr/2001PA066340.
Texto completoPautigny, Cyrielle. "Synthèse du SR58611A par amination réductrice directe et indirecte : hydrogénation asymétrique d'énamides et d'énamines". Paris 6, 2009. http://www.theses.fr/2009PA066533.
Texto completoMerdes, Rachid. "Syntheses asymetriques de diphosphines tertiaires chirales et quelques applications a la catalyse homogene". Paris 6, 1993. http://www.theses.fr/1993PA066428.
Texto completoCabou, Jérôme Brocard Jacques. "Synthèse d'une nouvelle classe de diphosphines ferrocéniques optiquement pures utilisation en catalyse asymétrique /". Villeneuve d'Ascq : Université des sciences et technologies de Lille, 2007. https://iris.univ-lille1.fr/dspace/handle/1908/181.
Texto completoN° d'ordre (Lille 1) : 3524. Résumé en français et en anglais. Titre provenant de la page de titre du document numérisé. Bibliogr. p. 290-295.
Crosman, George Adrian. "Immobilization of Rh-diphosphine complexes on mesostructured materials and their application to asymmetric hydrogenation and hydroboration". Aachen Shaker, 2009. http://d-nb.info/999464981/04.
Texto completoFournier, Éric. "Synthèse et caractérisation de polymères organométalliques luminescents de cuivre(I) et d'argent(I) à base de diphosphines et diisocyanures". Sherbrooke : Université de Sherbrooke, 2003.
Buscar texto completoRobert, Fabien. "Synthèse de ligands chiraux de type diphosphine et aminophosphine : application en catalyse énantiosélective via les complexes du rhodium et du palladium". Lyon 1, 1998. http://www.theses.fr/1998LYO10192.
Texto completoJeulin, Séverine. "Synphos® et difluorphos® : diphosphines chirales par atropoisomérie : évaluation des propriétés stériques et électroniques, synthèses d' analogues et applications en catalyse asymétrique". Paris 6, 2005. https://pastel.archives-ouvertes.fr/pastel-00001690.
Texto completoMarrot, Sébastien. "Carbènes N-Hétérocycliques : Des catalyseurs en chimie des silicones. Carbodiphosphoranes cycliques : Synthèse, coordination et réactivité". Phd thesis, Toulouse 3, 2007. http://www.theses.fr/2007TOU30037.
Texto completoIn a first chapter, we are interested in the use of N-Heterocyclic Carbenes like nucleophilic organic catalysts for ring opening polymerization of octamethylcyclosiloxane and for reactions of polycondensation. In a second chapter, we carry out a bibliographical review on compounds presenting two cumulated ylides functions : carbodiphosphoranes. In a third chapter, we present the synthesis and the coordination of new cyclic carbodiphosphoranes. They are recognized to be strong s-donor ligands for transition metals. In a fourth chapter, we study the thermolysis of one of these compounds which leads by rearrangement to the formation of a 1,2l5-azaphosphète. A theoretical study highlights an inter-conversion between carbodiphosphoranes and disphosphinocarbenes
Sandroni, Martina. "Synthèse et caractérisation de complexes hétéroleptiques de cuivre (I) pour la conversion de l'énergie solaire : [Résumé]". Nantes, 2012. https://archive.bu.univ-nantes.fr/pollux/show/show?id=c2715f41-045b-4ea7-a204-3ce1e3640785.
Texto completoCette thèse décrit la synthèse et la caractérisation de complexes hétéroleptiques de cuivre (I) avec des ligands diimine et diphosphine pour la conversion de l’énergie solaire. Les molécules ont été synthétisées en utilisant l’approche HETPHEN, et ont fait l’objet de caractérisations physicochimiques et photophysiques. En premier lieu, la synthèse et l’étude de nouveaux complexes de cuivre hétéroleptiques ont été menées en considérant en particulier l’effet de l’encombrement stérique de la sphère de coordination. Deux ligands originaux contenant un noyau phénanthroline étendu, et des fonctions réactives bromo, sont ensuite décrits ainsi que les complexes correspondants. Une augmentation des coefficients d’absorption dans le visible a été obtenue grâce à l’utilisation de ligands push-pull de type styrylbipyridine. Dans le chapitre 4, l’utilisation des complexes hétéroleptiques de cuivre(I) diimine pour le transfert de charge photoinduit dans des assemblés linéaires a été développée. Deux dyades Cu-NBI (naphthalène bisimide) ont été synthétisées et caractérisées. La spectroscopie d’absorption transitoire a mis en évidence des transferts d’électron photoinduits. Un donneur d’électrons secondaire (ferrocène) a ensuite été rajouté, pour former une triade qui conduit à un temps de vie de l’état à charges séparées de 30 ns dans l’acétonitrile. Le dernier chapitre porte sur la conception de sensibilisateurs dans des cellules solaires à colorant (DSSCs). Deux séries de complexes de cuivre(I) ont été préparées et caractérisées. L’une des deux a montré des performances photovoltaïques très prometteuses (2,4% sous 1000 W/m2)
Stolze, Karoline. "Synthese und Charakterisierung niedervalenter Actinoidphosphidtelluride und ternärer Selen-Halogenid-Komplexe des Iridiums". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-202233.
Texto completoLiu, Jie. "Substitution chemistry of the cobalt complexes RCCo3(CO)9 (R = H, CHO) with the diphosphine ligand: 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd). Syntheses, X-ray structures and reactivity". Thesis, University of North Texas, 2001. https://digital.library.unt.edu/ark:/67531/metadc3043/.
Texto completoJeulin, Séverine. "Synphos et difluorphos : diphosphines chirales par atropoisomérie. Évaluation des propriétés stériques et électroniques, synthèse d'analogues et applications en catalyse asymétrique". Phd thesis, 2005. http://pastel.archives-ouvertes.fr/pastel-00001690.
Texto completoBonnaventure, Isabelle. "Synthèse de nouveaux ligands hémilabiles chiraux : application à la synthèse énantiosélective". Thèse, 2008. http://hdl.handle.net/1866/6567.
Texto completoTai-YenLin y 林泰言. "Syntheses and Characterization of Lead(II), Copper(I) and Iron(II) Complexes with tetradentate diphosphine-dithiolate ligand derivatives". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/17925395142905230744.
Texto completo國立成功大學
化學系
103
Our laboratory has developed a series of phosphine-thiolate ligands in order to understand metal thiolate chemistry. It is anticipated the information provided from this study can bring insights for understanding the metal-sulfur chemistry in biological systems as well as in toxicity. In this thesis, diphosphine-dithiolate ligand (P2S2) was utilized for exploring metal chemistry. 31P, 207Pb NMR in solid and solution state were applied on two lead(II) compelexes, Pb(P2S2”) (1) and [Pb(P2S2”)]2·[Pb2(P2S2”)2] (2). Pb(P2S2”) (1) is a monolead(II) species binding with a P2S2” ligand. [Pb(P2S2”)]2·[Pb2(P2S2”)2] contains two monolead(II) units and a dimeric unit. These compounds were synthesized and characterized in our laboratory before. In addition, a hexacopper(I) complex of P2S2” ligand, [Cu3(P2S2”)(Im)(TMSPhS)]2 , has been isolated and characterized by X-ray crystallography and spectroscopies. Finally, iron carbonyl chemistry with P2S2” ligand was also been explored. The isolated compound was identified as cis-Fe(P2S2”)(CO)2 by comparing the spectroscopies with the other analogue cis-Fe(P2S2*)(CO)2, that is synthesized and well characterized in our laboratory.
Stolze, Karoline. "Synthese und Charakterisierung niedervalenter Actinoidphosphidtelluride und ternärer Selen-Halogenid-Komplexe des Iridiums". Doctoral thesis, 2015. https://tud.qucosa.de/id/qucosa%3A29471.
Texto completo