Listar por autoría "a357444d-eb64-447d-b63b-d0963140eaaa"
Mostrando ítems 1-20 de 28
-
1H-1,2,3-Triazol-5-ylidenes: Readily Available Mesoionic Carbenes
Guisado-Barrios, Gregorio; Soleilhavoup, Michele; Bertrand, Guy 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 Hemilabile and Cooperative N-Donor-Functionalized 1,2,3-Triazol-5-Ylidene Ligand for Alkyne Hydrothiolation Reactions
Strydom, Ian; Guisado-Barrios, Gregorio; Fernandez, Israel; Liles, David C.; Peris, Eduardo; Bezuidenhout, Daniela Wiley (2017)A series of novel cationic and neutral Rh complexes with an N-donor-functionalized 1,2,3-triazol-5-ylidene (TRZ) ligand (in which the pendant N donor is NHBoc, NH2, or NMe2) is described. The catalytic activity of these ... -
A Platinum molecular complex immobilised on the surface of graphene as active catalyst in alkyne hydrosilylation
Mollar Cuni, Andrés; Borja, María Pilar; Guisado-Barrios, Gregorio; Mata Martínez, Jose A Wiley (2020-05-11)Abstract A platinum complex bearing a N‐heterocyclic carbene (NHC) ligand functionalised with a pyrene‐tag is immobilised onto the surface of reduced graphene oxide (rGO). The hybrid material composed of an organometallic ... -
A rhodium(I)–oxygen adduct as a selective catalyst for one-pot sequential alkyne dimerization-hydrothiolation tandem reactions
kleinhans, George; Guisado-Barrios, Gregorio; Liles, David C.; Bertrand, Guy; Bezuidenhout, Daniela Royal Society of Chemistry (2016-01)An air-stable rhodium(I)–oxygen adduct featuring a CNC-pincer ligand, based on 1,2,3-triazol-5-ylidenes, catalyzes the homo-dimerization and hydrothiolation of alkynes, affording the gem-enyne and α-vinyl sulfide isomers, ... -
A Size‐Flexible Organometallic Box for the Encapsulation of Fullerenes
Martínez Agramunt, Víctor; Eder, Tobias; Darmandeh, Heidar; Guisado-Barrios, Gregorio; Peris, Eduardo 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 ... -
Catalytic conversion of alkynes to α-vinyl sulfides mediated by carbene-linker-carbene (CXC) rhodium and iridium complexes
Tolley, Lewis C.; Fernandez, Israel; Bezuidenhout, Daniela; Guisado-Barrios, Gregorio The Royal Society of Chemistry (2021-01-21)The catalytic activity of a set of mono- and bimetallic Rh(I) and Ir(I) complexes bearing carbene-linker-carbene (CXC) bis-triazolylidene ligands (with X = O, N) coordinated in a bridging or chelating fashion was evaluated ... -
Coordination singularities of a bis(p-xylyl)bis(benzimidazolylidene) ligand and the bis-iridium and -rhodium-related complexes
Ruiz-Botella, Sheila; Guisado-Barrios, Gregorio; Mata Martínez, Jose A; Peris, Eduardo American Chemical Society (2013)The reaction of bis(α,α′-p-xylyl)bis(benzimidazolium) dichloride with [IrCpCl2]2 or [RhCl(COD)]2 affords the corresponding dimetallic bis-N-heterocyclic carbene complexes of Ir and Rh. The reaction with the iridium complex ... -
(Di)triazolylidene manganese complexes in catalytic oxidation of alcohols to ketones and aldehydes
Pinto, Mara; Olivares, Marta; Vivancos Ureña, Ángela; Guisado-Barrios, Gregorio; albrecht, martin; Royo, Beatriz Royal Society of Chemistry (2019)Carbonyl manganese complexes with chelating or bridging mesoionic di(1,2,3-triazolylidene) ligands were efficiently synthesised and fully characterised, including the X-ray diffraction study of a bimetallic manganese(0) ... -
Diverse Coordination Modes of Bidentate COC and Tridentate CNC Ligands Comprising 1,2,3-Triazol-5-ylidenes
Tolley, Lewis C.; Strydom, Ian; Louw, Wynand J.; Fernandes, Manuel A.; Bezuidenhout, Daniela; Guisado-Barrios, Gregorio American Chemical Society (2019)Two readily available bis(1,2,3-triazol-5-ylidene) ligand precursors [H2(COC)](PF6)2 and [H2(CHNC)](PF6)2, bridged by an ether or amine functionality, respectively, were prepared. Their coordination versatility was evaluated ... -
Dual role of graphene as support of ligand-stabilized palladium nanoparticles and carbocatalyst for (de)hydrogenation of N-heterocycles
Mollar Cuni, Andrés; Martín Solans, Santiago; Guisado-Barrios, Gregorio; Mata Martínez, Jose A Elsevier (2023-02-18)The hybrid material composed of palladium nanoparticles (PdNPs) functionalized with N-heterocyclic carbene ligands (NHCs) immobilized onto the surface of reduced graphene oxide (rGO) results in an efficient catalytic ... -
First homoleptic MIC and heteroleptic NHC-MIC coordination cages from 1,3,5-triphenylbenzene-bridged tris-MIC and tris-NHC ligands
Mejuto, Carmen; Guisado-Barrios, Gregorio; Gusev, Dmitry; Peris, Eduardo Royal Society of Chemistry (2015-07-24)The preparation of a triphenylbenzene-bridged tris-(1,2,3-triazolium) salt allowed us to obtain the first homoleptic tris-MIC cylinder-like cages of Ag and Au. The silver MIC-based cage reacts with the trisNHC-Ag analogue ... -
Hexanuclear cylinder-shaped assemblies of silver and gold from benzene−hexa-N-heterocyclic carbenes
Segarra, Candela; Guisado-Barrios, Gregorio; Hahn, Franz Ekkehardt; Peris, Eduardo American Chemical Society (2014)In this work we describe the preparation of a new benzene–hexaimidazolylidene ligand, which we have coordinated to silver and gold. The new complexes constitute unique examples of cylinder-like macromolecular arrangements, ... -
Introducing Ion Mobility Mass Spectrometry to Identify Site-Selective C–H Bond Activation in N-Heterocyclic Carbene Metal Complexes
Mollar Cuni, Andrés; Ibañez-Ibañez, Laura; Guisado-Barrios, Gregorio; Mata Martínez, Jose A; Vicent Barrera, Cristian American Chemical Society (2022-11-14)The activation of C−H bonds in a selective manner still constitutes a major challenge from a synthetic point of view; thus, it remains an active area of fundamental and applied research. Herein, we introduce ion mobility ... -
IrIII/AuI and RhIII/AuI Heterobimetallic Complexes as Catalysts for the Coupling of Nitrobenzene and Benzylic Alcohol
Böhmer, Maximilian; Kampert, Florian; Tan, Tristan; Guisado-Barrios, Gregorio; Peris, Eduardo; Hahn, Franz Ekkehardt American Chemical Society (2018)Two simple bisimidazolium salts derived from m- or p-bisimidazolebenzenes have been used as ligand precursors for the preparation of a series of heterobimetallic RhIII/AuI and IrIII/AuI complexes. All complexes have ... -
Isolation of a potassium bis(1,2,3-triazol-5-ylidene) carbazolide: a stabilizing pincer ligand for reactive late transition metal complexes
Bezuidenhout, Daniela; Kleinhans, George; Guisado-Barrios, Gregorio; Liles, David C.; Üng, Gaël; Bertrand, Guy Royal Society of Chemistry (2014)The synthesis and X-ray crystal structure of a potassium adduct of a monoanionic CNC-pincer ligand featuring two mesoionic carbenes is reported. Owing to the peculiar electronic and steric properties of this ligand, the ... -
Novel rhodium and iridium complexes coordinated to C3‑symmetric tris-NHC ligands based on a 1,3,5-triphenylbenzene core. Electronic and catalytic properties
Mejuto, Carmen; Guisado-Barrios, Gregorio; Peris, Eduardo American Chemical Society (2014)A series of novel tris-azolium salt precursors based on 1,3,5- triphenylbenzene have been prepared. These salts exhibit fluorescence emission in the 320−420 nm region. The coordination of these salts to [MCl(COD)]2 (M ... -
Nucleophilic T-Shaped (LXL)Au(I)-Pincer Complexes: Protonation and Alkylation
Kleinhans, George; Hansmann, Max M.; Guisado-Barrios, Gregorio; Liles, David C.; Bertrand, Guy; Bezuidenhout, Daniela American Chemical Society (2016-11)We report the synthesis and reactivity of unusual T-shaped (LXL)Au(I)-pincer complexes, based on a carbazole framework flanked by two mesoionic carbenes (MICs). In contrast to other Au(I) complexes, these complexes react ... -
Power factor improvement in a solid–liquid thermoelectric system formed by Sb:SnO2 in contact with a chromium complex solution
Castro Ruiz, Sergio; Márquez García, Lourdes; Solis de la Fuente, Mauricio; Beltrán-Pitarch, Braulio; Mota-Babiloni, Adrián; Vidan-Falomir, Francisco; Íñigo-Rabinal, P.; Guisado-Barrios, Gregorio; García-Cañadas, Jorge Royal Society of Chemistry (2023)Thermoelectric (TE) materials can convert heat into electricity. Good TE materials should have high power factors (PF) and low thermal conductivities. PF = S2σ is governed by the Seebeck coefficient S and the electrical ... -
Pyracene-Linked Bis-Imidazolylidene Complexes of Palladium and Some Catalytic Benefits Produced by Bimetallic Catalysts
Guisado-Barrios, Gregorio; Hiller, Joanna; Peris, Eduardo Wiley (2013-06-18)Two new palladium complexes with a pyracene-linked bis-imidazolylidene (pyrabim) group have been obtained and fully characterized. The related monometallic analogues were obtained from the coordination of an acetanaphthe ... -
Rhodium, iridium and nickel complexes with a 1,3,5-triphenylbenzene tris-MIC ligand. Study of the electronic properties and catalytic activities
Mejuto, Carmen; Royo, Beatriz; Guisado-Barrios, Gregorio; Peris, Eduardo Beilstein-Institut (2015-12-14)The coordination versatility of a 1,3,5-triphenylbenzene-tris-mesoionic carbene ligand is illustrated by the preparation of complexes with three different metals: rhodium, iridium and nickel. The rhodium and iridium complexes ...