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Dissertations / Theses on the topic 'Palladium NHC-complexes'

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Published: 4 June 2021
Last updated: 16 February 2022

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1

Hameury, Sophie. "Oxygen-functionalized NHC ligands and their nickel(II), silver(I) and palladium(II) complexes." Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAF010.

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L’objectif de cette thèse portait sur la synthèse de complexes portant un ligand NHC associé à une fonction oxygénée et à leur application en catalyse d’oligomérisation de l’éthylène. Dans le but de synthétiser des complexes avec des ligands NHCalcool, les complexes d’argent correspondants ont été synthétisés et utilisés en transmétallation. Aucun résultat concluant n’a pu être obtenu avec le nickel à cause de l’acidité du proton alcoolique. Mais un ligand NHC-alcoolate a pu être obtenu par déprotonation directe du pro-ligand avec une base forte. Il fut alors possible d’accéder à des complexes
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2

Kong, Lingyu. "De ligands NHCs prochiraux à des complexes métal-NHC énantiopurs : nouvelles perspectives pour la catalyse asymétrique." Electronic Thesis or Diss., Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0502.

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Les carbènes N-hétérocycliques (NHC) sont connus pour être de bons ligands des métaux de transition (TM). Dans ce manuscrit, le premier chapitre est consacré une présentation non exhaustive des différentes approches qui ont été utilisées dans la littérature pour le design de NHCs chiraux efficaces en catalyse enantiosélective. Au début du deuxième chapitre, le nouveau concept est présenté. Celui-ci repose sur la formation d’un axe de chiralité qui est créé lors de la coordination du ligand NHC à un métal de transition. Ce chapitre est consacré à la synthèse de complexes possédant une symétrie
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3

Martínez, Agramunt Víctor. "Nickel and palladium supramolecular organometallic complexes based on NHC-ligands with polyaromatic moieties for host-guest chemistry studies." Doctoral thesis, Universitat Jaume I, 2020. http://dx.doi.org/10.6035/14104.2020.366143.

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Se ha obtenido una nueva familia de cuatro Complejos Organometálicos Supramoleculares (SOCs) basados en pireno. Dentro de los cuales se ha desarrollado un nuevo receptor de PAH, capaz de discernir entre los diferentes PAH en función de su forma, tamaño, y número de electrones-pi. Hemos desarrollado una estrategia eficiente para la extracción de PAH, que son compuestos tóxicos y carcinogénicos, en disolventes orgánicos. Paralelamente, se han obtenido dos receptores de fulereno, capaces de adaptar su tamaño a la forma del fulereno. Debido a la mayor afinidad respecto a un fulereno específico, mo
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4

Loxq, Pauline. "Ligands carbènes N-hétérocycliques fonctionnalisés chiraux pour les réactions de couplage C-C asymétriques." Toulouse 3, 2014. http://thesesups.ups-tlse.fr/2567/.

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L'accès à de nouvelles molécules bioactives nécessite des méthodologies de synthèse permettant l'obtention privilégiée d'un seul énantiomère. La catalyse asymétrique en général et la réaction de Suzuki-Miyaura asymétrique en particulier s'inscrivent dans cette démarche. Notre projet s'axe dans cette thématique, dans l'optique de développer de nouveaux catalyseurs chiraux pour la réaction de Suzuki-Miyaura asymétrique. Deux familles de complexes de palladium à ligands ferrocéniques chiraux bifonctionnels NHC/phosphine et NHC/amine ont été développés. La première famille de complexes a été synth
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5

Wang, Hongwang. "Meeting the challenges: carbon-hydrogen bond activation and cancer treatment." Diss., Kansas State University, 2009. http://hdl.handle.net/2097/7510.

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Doctor of Philosophy<br>Department of Chemistry<br>Stefan Bossmann<br>My thesis is divided into two parts. The first part is focused on studies of N-heterocyclic carbene (NHC) palladium(IV) intermediates, which are involved in oxidative addition mediated C-C, and C-O bond formation processes as well as in C-Cl bond forming reactions via a reductive elimination process. Bis-NHC-Pd(II) complexes have been reported as effective catalysts to mediate direct conversion of methane into methanol. However, a H-D exchange study revealed that the bis-NHC-Pd(II) complexes are not the active species r
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6

Ellul, Charles. "Trimetallic N-heterocyclic carbene complexes." Thesis, University of Bath, 2011. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538279.

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7

Boschetti, Riccardo. "Synthesis of novel N-heterocyclic carbene precursors for new chiral complexes." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16665/.

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Lo scopo del seguente lavoro di tesi è la sintesi e lo studio di nuovi leganti chirali N-eterociclici ad anello espanso derivanti dal diacido canforico. Lo sviluppo di nuovi leganti chirali nasce dalla possibilità di utilizzo in catalisi enantioselettiva. Questa tipologia di leganti sono facilmente sintetizzati dal diacido canforico utilizzando diverse vie di sintesi. La via di sintesi utilizzata permette di ottenere facilmente una funzionalizzazione asimmetrica. Il legante è stato studiato nella sintesi di un nuovo complesso chirale di Pd(II) utilizzando diverse condizioni di reazione. Inoltr
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8

Flahaut, Alexandre. "Utilisation de complexes carbènes N-hétérocyclique-palladium dans la réaction de Tsuji-Trost et dans la réaction umpolung d'allylation de dérivés carbonylés." Paris 6, 2008. http://www.theses.fr/2008PA066149.

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Nous avons décrit la synthèse d’une nouvelle famille de ligand NHC-N chiraux bidentates et leur utilisation dans la réaction de Tsuji-Trost. Ces ligands ont été facilement obtenus à partir des sels amino-imidazolium chiraux correspondants synthétisés à partir de sels oxo-imidazoliums sur lesquels la chiralité a été introduite par une réaction de formation d’une imine avec des amines chirales. Une réduction diastéréosélective a permis un accès efficace aux sels amino-imidazoliums. Les complexes NHC-amino et imino des métaux de transition ont été obtenus par traitement des sels imidazoliums avec
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9

Pearson, Stephen. "High oxidation state carbene complexes for C-H bond activation catalysis." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/7570.

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Chapter one is an introduction to the less common coordination and oxidation chemistry of palladium; complexes containing Pd-OR, Pd-NR2 and those in the oxidation states of +IV. An outline of PdII/IV catalysed ligand-directed oxidative functionalisation is also included. Chapter two covers the design and synthesis of a range of tethered N-heterocyclic carbene (NHC) complexes of Pd. In addition, the syntheses of a number of new tethered NHC ligands are described. The use of Density Functional Theory (DFT) to model the complexes in this thesis was explored. Chapter three describes the synthesis
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10

CHEN, HONG-SHIANG, and 陳泓翔. "Syntheses, Structures, and Catalytic Activities of Hemilabile Pyridine-Functionalized NHC Nickel and Palladium Complexes." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/39312514964910487749.

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11

Lee, Yan-Yi, and 李衍毅. "The Use of Isomeric Normal and Abnormal Palladium NHC Complexes in Direct C5-arylation Reaction." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/3fes4m.

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碩士<br>國立彰化師範大學<br>化學系<br>106<br>We designed four series of isomeric palladium(II) complexes normal and abnormal N-Heterocyclic Carbenes (NHCs) ligands. These complexes were characterized by 1H and 13C NMR spectroscopy, elemental analysis and X-ray crystallography. Their potential application as catalysts in direct C5-arylation reaction between imidazoles and aryl halides were investigated. Using a mere 0.5 mol % Pd loading, coupled products were obtained with moderate to excellent yields. Normal NHCs complexes have better catalytic activity than their abnormal counterpart. DFT calculations wer
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12

Li-Kuang, Chang, and 張立光. "Syntheses and characterizations of Amido and Alkyl functionalized NHC Complexes of Mercury(II) and Palladium(II)." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/8e5aw6.

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13

Gao, Zing-Lun, and 高政論. "Effect of Orthometallation on NHC Palladium Complexes on the Catalytic Activity Studies in Suzuki Coupling Reaction." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/rde578.

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碩士<br>靜宜大學<br>應用化學系<br>105<br>This work helps to understand how to improve catalytic activities for cross-coupling reaction. N-heterocyclic carbene (NHC) palladium complexes bearing nitrogen-based ligand without orthometallation show remarkable activities than with orthometallation one in Suzuki coupling reaction. All complexes are characterized by single X-ray diffraction as well as 1H and 13C NMR spectroscopy. From catalytic studies, without orthometallation NHC palladium complexes exhibit shorter pre-activation time to achieve very good activity results in Suzuki coupling reaction when aryl
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14

Ke, Chun Hung, and 柯俊宏. "Novel Abnormal NHC Palladium Complexes in Catalytic Reaction and Hydrothermal Synthesis of Coordination Polymers with Interesting Topologies." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/38904264599926679749.

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碩士<br>國立彰化師範大學<br>化學系<br>100<br>N-heterocyclic carbene (NHCs) are neutral ligands with strong electron donating property and air-robustness. They are excellent ligands in organometallic chemistry and homogeneous catalysis. In our lab, we have achieved a series of transition-metal complexes containing NHCs; however, we do not have any research result on complexes with “abnormal” N-heterocyclic carbenes (aNHCs) yet. For this reason, we go further to explore something new based on previous study and successfully develop a series of novel abnormal NHC palladium complexes. We also designed a seri
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15

Kuo, Ya-Ting, and 郭雅婷. "Dimetallic Palladium NHC Complexes with Polyaromatic Functionalities: Catalytic Application of Suzuki-Miyaura Coupling Reactions in Neat Water." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/v7gq9h.

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碩士<br>國立彰化師範大學<br>化學系<br>105<br>A series of dimetallic palladium(II) NHC complexes and related compounds with aromatic functionalities ranging from 1,4-diphenyl, 1,4-napthalenyl, and 9,10-anthracenyl groups attached to 2-position of imidazole rings were successfully synthesized. These complexes were characterized by 1H and 13C{1H} NMR spectroscopy, and elemental analysis. The structures of two dimetallic palladium complexes and a mononuclear palladium complex were further characterized by X-ray diffraction studies. The capability of the dimetallic palladium complex with 9,10-anthracenyl linker
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16

Chang, Wei-Ju, and 張瑋如. "Syntheses and Characterizations of Amido- and Pyridine-functionalized NHC Carbene Complexes of Mercury(II), Palladium(II) and Nickel(II)." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/13402034927629867798.

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