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Showing 1 to 12 of 12 for “"Carbene ligands"”.
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COMPLEXES OF GROUP 10 METALS WITH NON-CLASSICAL AND THIOETHER-FUNCTIONALIZED N-HETEROCYCLIC CARBENE LIGANDS
… structures of 14 related N-heterocyclic carbene ligands, and their binding to early and late transition metal fragments, which has been studied by means of DFT calculations. In the second part, the donor strengths of pyrazole ligands has been determined and correlated to their …
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Development of N-heterocyclic carbene ligands for nanomaterials in aqueous media and expanding the interface of metal-organic framework (MOF) and polymer chemistry via polyMOFs
… This thesis focuses on expansion of the types of ligands available for (1) metallic nanomaterial surface modification and (2) metal-ligand driven supramolecular assembly. (1) Surface ligands are typically used for surface passivation, imparting new properties such as solubility, or introducing a …
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A New 2,1,3-Benzothiadiazole-Fused N-Heterocyclic Carbene and Its Metal Complexes
<p>In the last few decades, N-heterocyclic carbenes (NHCs) have emerged as a powerful class of carbon-based ligands. Owing to their unique electronic and steric properties, they have been incorporated in a large variety of catalytically active metal complexes. One of the strategies that have been …
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Kinetic Studies of 6-Halopurine Nucleoside in SNAr Reactions; 6-(Azolyl, Alkylthio and Fluoro)-purine Nucleosides as Substrates for Suzuki Reactions
… and palladium-based systems with imidazolium-carbene ligands can catalyze efficient Suzuki cross-couplings of arylboronic acids and 6-[(imidazol-1-yl)-, (1,2,4-trizaol-4-yl), fluoro, alkylsulfanyl and alkylsulfonyl]purine 2'-deoxynucleosides and nucleosides to give the corresponding …
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Synthesis and application of rhodium(I) Fischer carbene complexes
In this study, novel rhodium(I) carbene complexes were synthesized and fully characterized via a carbene ligand transfer methodology from Group 6 Fischer carbene complex precursors and subsequent ligand modification. The classic Fischer route was followed towards the isolation of mono- and …
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Study of Bis-Imidazol-2-Ylidines as Ligands for Transition Metal Catalyzed Coupling Reactions
Two bis-imidazol-2-ylidine N-heterocyclic carbenes have been employed as ancillary ligands in an attempt to illustrate their utility in the palladium-mediated preparation of aryl ethers from aryl halides. Ullman-type homo-coupling of the aryl halides persistently occurred instead of ether …
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Fluoroalkoxy-functionalized carbenes for main group and transition metal complexes
… of imidazol-2-ylidenes for their applications as ligands for main group elements and transition metals and as sterically hindered Lewis bases for hydrogen activation. Chapter 1 reviews the background of carbenes as ligands for main group compounds and transition metal complexes. The history and …
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Surface chemistry of N-Heterocyclic carbenes and the self-assembly, structure, and properties of polymer metal-organic cage gels
Chapter 1. Introduction to Carbene Ligands in Surface Chemistry: From Stabilization of Discrete Elemental Allotropes to Modification of Nanoscale and Bulk Substrates In this chapter, we review the development of carbene surface chemistry from its inception through 2015, covering elemental allotrope …
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Síntesis de nanoestruturas metálicas de oro y plata a partir de precursores organometálicos: Propiedades plasmónicas y catalíticas
… precursor complexes bearing pentafluorophenyl ligands or similar organometallic gold(I) complexes bearing also imidazolium of N-heterocyclic carbene ligands and their decomposition in the presence of different stabilizing ligands. The use of this organometallic approach has allowed us to …
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Mechanistic Studies of pi-Activation Catalysis by Cationic Gold(I) and Brønsted-acid
… synthesized and characterized in situ. The π-ligands in the triphenylphosphine gold complexes were considerably more labile than those bearing bulky, electron rich phosphine or N-heterocyclic carbene ligands, and the complexes decomposed in solution above -20 °C.</p><p>Mechanistic …
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Fischer and N-heterocyclic carbene complexes of Group (VII) transition metals
… application of Fischer- and N-heterocyclic carbene (NHCs) complexes of the group VII transition metals were investigated. By using density function theory calculations, the structural and electronic parameters could be elucidated and the fundamental bonding interactions between the carbene …
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Strategies to Optimize Photophysical Properties in Cyclometalated Iridium Complexes
… conjugated compounds, and their use as metalloligands in the assembly of polynuclear complexes. Chapter 3 investigates a series of neutral Chugaev-type chelating dicarbene iridium complexes with diverse cyclometalating ligands. In Chapter 4, the reactivity of bis-cyclometalated iridium …