Listar por tema "N-heterocyclic carbenes"
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1H-1,2,3-Triazol-5-ylidenes: Readily Available Mesoionic Carbenes
American Chemical Society (2018)Classical carbenes are usually described as neutral compounds featuring a divalent carbon with only six electrons in their valence shell. It was only in 1988 that our group prepared the first isolable example, in which the ... -
A corannulene-based metallobox for the encapsulation of fullerenes
Royal Society of Chemistry (2024-07-16)A corannulene-bis-N-imidazolium salt was used for the synthesis of two corannulene-bis-N-heterocyclic carbenes of dirhodium(I) complexes of formula (corannulene-di-NHC)[RhCl(COD)]2 and (corannulene-di-NHC)[RhCl(CO)2]2. ... -
A D3h-symmetry hexaazatriphenylene-tris-N-heterocyclic carbene ligand and its coordination to iridium and gold: preliminary catalytic studies
Royal Society of Chemistry (2017)A new D3h-symmetry tris-N-heterocyclic carbene ligand has been prepared and coordinated to iridium and gold. The ligand contains an electron-poor hexaazatriphenylene core; thus, the resulting tris-NHC ligand is a poor ... -
A Matter of Fidelity: Self‐Sorting Behavior of Di‐Gold Metallotweezers
Wiley (2019-06)Cation‐induced high selective self‐sorting is observed for reactions involving a series of di‐gold metallotweezers. The variation of the nature of the arms of the tweezers (benzo‐imidazolylidene or pyrene‐imidazolylidene), ... -
A Rigid Trigonal‐Prismatic Hexagold Metallocage That Behaves as a Coronene Trap
Wiley (2019-05-13)A trigonal‐prismatic hexagold cage was obtained by combining a triphenylene‐tris(N‐heterocyclic carbene) ligand and a carbazolyl‐bis(alkynyl) linker. The metallocage has a slot‐like cavity with a volume of about 300 Å3. ... -
A Size‐Flexible Organometallic Box for the Encapsulation of Fullerenes
Wiley (2019-04-19)A palladium‐cornered molecular square with four pyrene‐bis(imidazolylidene) bridging ligands is reported. This metallo‐polygon can encapsulate C60 and C70. The X‐ray diffraction structures of the empty cage as well as the ... -
Catalyst Enhancement and Recyclability by Immobilization of Metal Complexes onto Graphene Surface by Noncovalent Interactions
ACS Publications (2014-05-14)The immobilization of a homogeneous catalyst onto a solid surface is one of the major challenges in catalysis, because it may facilitate the separation of the catalyst and the reaction products and may also give rise to ... -
Cation-Driven Self-Assembly of a Gold(I)-Based Metallo-Tweezer
Wiley (2017-08-07)A combination of self-complementary pi-pi-stacking interactions and metallophilic interactions triggered the self-assembly of a new digold(I) metallo-tweezer in the presence of several types of M+ ions. Titrations by ... -
Design of polytopic ligands for the preparation of multifunctional catalysts
Universitat Jaume I (2015-03-06)<p>En esta Tesis Doctoral se han sintetizado tres nuevos ligandos politópicos basados en carbenos N-heterocíclicos (NHCs en sus siglas en inglés) con diferentes tipos de arquitecturas.</p> <p>En primer lugar se ha obtenido ... -
Dimensional Matching versus Induced‐Fit Distortions: Binding Affinities of Planar and Curved Polyaromatic Hydrocarbons with a Tetragold Metallorectangle
Wiley (2020-04-20)A tetragold(I) rectangle‐like metallocage containing two pyrene‐bis‐imidazolylidene ligands and two carbazolyl‐bis‐alkynyl linkers is used for the encapsulation of a series of polycyclic aromatic hydrocarbons (PAHs), ... -
Double CH bond activation of C(sp3)H2 groups for the preparation of complexes with back-to-back bisimidazolinylidenes
Wiley (2011-06-29)Two-headed carbenes: N-heterocyclic carbene complexes of rhodium and iridium were obtained by the double CH activation of CH2 groups in N heterocycles (see structure: C gray, N blue, Cl green, Ir pink). The reaction ... -
Experimental and Theoretical Approaches to the Influence of the Addition of Pyrene to a Series of Pd and Ni NHC-Based Complexes: Catalytic Consequences
Wiley (2014-11-20)A series of Ni and Pd complexes with three different N-heterocyclic carbene (NHC)-based ligands (imidazolylidene, benzimidazolylidene and pyrene–imidazolylidene) has been prepared and fully characterized. The influence of ... -
Guest-shuttling in a nanosized metallobox
Wiley (2024-01-05)An iridium-conjoined long and narrow metallorectangle was obtained by combining a quinoxalinophenanthrophenazine-connected Janus-di-imidazolylidene ligand and pyrazine. The size and shape of this assembly together with the ... -
Palladium N-Heterocyclic Carbene Catalysts for the Ultrasound-Promoted Suzuki-Miyaura Reaction in Glycerol
Wiley (2013-04-15)Novel palladium N-heterocyclic-carbene (NHC)-based complexes with 3,4,5-trimethoxybenzyl, alkyl and sulfonate N-substituents were obtained and fully characterized. The new complexes were used as pre-catalysts in the ... -
Perceptible Influence of Pd and Pt Heterocyclic Carbene–Pyridyl Complexes in Catalytic Diboration of Cyclic Alkenes
Wiley-VCH (2010)Bis(catecholato)diboron was added to cyclic alkenes with internal strain to selectively form bis(boryl)cycloalkanes quantitatively in the presence of [Pd(NHC)pyCl2], [Pd(NHC)pyI2], and [Pt(NHC)pyI2] (NHC=N-heterocyclic ... -
Platinum-Based Organometallic Folders for the Recognition of Electron-Deficient Aromatic Substrates
Wiley (2017-05-29)A series of platinum complexes with cis-oriented polyaromatic N-heterocyclic carbene ligands were prepared and characterized. The relative disposition of the polyaromatic ligands about the metal cause these compounds to ... -
Preparation and self-aggregation properties of a series of pyrene-imidazolylidene complexes of gold (I)
Elsevier (2020-06-21)This article describes the preparation of three different Au(I) complexes bearing a pyrene-imidazolylidene ligand, two of which are bound to phenyl-acetylene ligands. The supramolecular and photophysical properties of all ... -
Recent developments in the applications of palladium complexes bearing N-heterocyclic carbene ligands
Bentham Science Publishers (2011-01-09)N-heterocyclic carbene (NHC) ligands have become ubiquitous ligands in the preparation of metal complexes with new catalytic applications. Mainly due to their applications in C-C bond formation reactions, a plethora of ... -
Redox-Switchable Cycloisomerization of Alkynoic Acids with Napthalenediimide-Derived N-Heterocyclic Carbene Complexes
Wiley (2021-09-01)Two naphthalene-diimide (NDI) bis-imidazolium salts have been used as N-heterocyclic carbene (NHC) precursors for the preparation of NDI-functionalized complexes of rhodium and iridium of general formula [MCl(NDI-NHC)(COD)] ... -
Ruthenium molecular complexes immobilized on graphene as active catalysts for the synthesis of carboxylic acids from alcohol dehydrogenation
Royal Society of Chemistry (2016-09)Ruthenium complexes containing N-heterocyclic carbene ligands functionalized with different polyaromatic groups (pentafluorophenyl, anthracene, and pyrene) are immobilized onto the surface of reduced graphene oxide. The ...