Results 21 to 30 of about 14,653 (264)

[(1,2,5,6-η)-Cycloocta-1,5-diene](4-isopropyl-1-methyl-1,2,4-triazol-5-ylidene)(tricyclohexylphosphane-κP)iridium(I) tetrafluoridoborate dichloromethane monosolvate

IUCrData, 2022
The title compound, [Ir(C8H12)(C6H11N3)(C18H33P)]BF4·CH2Cl2, a triazole-based N-heterocyclic carbene iridium(I) cationic complex with a tetrafluoridoborate counter-anion, crystallizes with one dichloromethane solvent molecule per formula unit.
Joshua Rushlow, Andrei V. Astashkin, Daniel R. Albert, Edward Rajaseelan   +3 more
doaj   +1 more source

Self-assembly of N-heterocyclic carbenes on Au(111)

Nature Communications, 2021
Although N-heterocyclic carbenes (NHCs) are a promising class of ligands for forming robust self-assembled monolayers on metals, many questions remain about their behavior on surfaces.
Alex Inayeh, Ryan R. K. Groome, Ishwar Singh, Alex J. Veinot, Felipe Crasto de Lima, Roberto H. Miwa, Cathleen M. Crudden, Alastair B. McLean   +7 more
doaj   +1 more source

Actinide tetra-N-heterocyclic carbene ‘sandwiches’ [PDF]

Chemical Science, 2021
Highly-symmetrical, thorium and uranium octakis-carbene ‘sandwich’ complexes have been prepared by ‘sandwiching’ the An(iv) cations between two anionic macrocyclic tetra-NHC ligands, one with sixteen atoms and the other with eighteen atoms.
Joseph F. DeJesus, Ryan W. F. Kerr, Deborah A. Penchoff, Xian B. Carroll, Charles C. Peterson, Polly L. Arnold, David M. Jenkins   +6 more
openaire   +4 more sources

Synthesis of nano magnetic supported NHC-palladium and investigation of its applications as a catalyst in the Mizoroki-Heck cross-coupling reaction in H2O

Heliyon, 2020
The unique properties of N-heterocyclic carbenes (NHCs) as an effective ligand for palladium catalytic centers have recently found much attention. In this work, Fe3O4 nanoparticle supported palladium(II)–N-heterocyclic carbene catalyst was successfully ...
Razieh Ghavidel Kalishomi, Shahnaz Rostamizadeh, Fatemeh Nouri, Ali Khazaei   +3 more
doaj   +1 more source

Alkali-metal-mediated zincation (AMMZn) meets N-heterocyclic carbene (NHC) chemistry : Zn–H exchange reactions and structural authentication of a dinuclear Au(I) complex with a NHC anion [PDF]

, 2013
Merging two evolving areas in synthesis, namely cooperative bimetallics and N-heterocyclic carbenes (NHCs), this study reports the isolation of the first intermediates of alkali-metal-mediated zincation (AMMZn) of a free NHC and a Zn–NHC complex using ...
Aldeco-Perez, Andrikopoulos, Arduengo, III, Arduengo, III, Armstrong, Armstrong, Armstrong, Armstrong, Arnold, Arnold, Arnold, Back, Baillie, Bantu, Bourissou, Clegg, Clegg, Clegg, Conway, Crabtree, de Frémont, Diez-Gonzalez, Flower, Furuyama, Ghadwal, Gomez-Suarez, Guisado-Barrios, Haag, Hashmi, Hashmi, Hashmi, Hashmi, Hashmi, Hashmi, Jimenez-Nunez, Kobayashi, Kronig, Linton, Masuda, Mendoza-Espinosa, Mulvey, Mulvey, Mulvey, Mulvey, Musgrave, Nobuto, Raubnheimer, Rudolph, Rudolph, Schuster, Uchiyama, Wang, Wang, Wang, Wang, Westerhausen   +55 more
core   +1 more source

Direct estimate of the internal π-donation to the carbene centre within N-heterocyclic carbenes and related molecules

Beilstein Journal of Organic Chemistry, 2015
Fifteen cyclic and acylic carbenes have been calculated with density functional theory at the BP86/def2-TZVPP level. The strength of the internal X→p(π) π-donation of heteroatoms and carbon which are bonded to the C(II) atom is estimated with the help of
Diego M. Andrada, Nicole Holzmann, Thomas Hamadi, Gernot Frenking   +3 more
doaj   +1 more source

Half-Sandwich Ir(III) and Os(II) Complexes of Pyridyl-Mesoionic Carbenes as Potential Anticancer Agents [PDF]

, 2019
A series of cationic chlorido arene-iridium(III) and arene-osmium(II) complexes with bidentate pyridyl functionalized mesoionic carbenes (MIC) of the 1,2,3-triazol-5-ylidene type have been prepared.
Bolje, Aljoša, Brozović, Anamaria, Gržan, Tena, Hohloch, Stephan, Košmrlj, Janez, Kralj, Juran, Osmak, Maja, Sarkar, Biprajit, Steiner, Ivana, Stojanović, Nikolina, Stupin Polančec, Darija, Tupek, Ana, Urankar, Damijana   +12 more
core   +1 more source

[(1,2,5,6-η)-Cycloocta-1,5-diene](1-ethyl-4-isopropyl-1,2,4-triazol-5-ylidene)(triphenylphosphane)iridium(I) tetrafluoridoborate dichloromethane sesquisolvate

IUCrData, 2023
The synthesis and crystal structure of a new triazole-based N-heterocyclic carbene iridium(I) cationic complex with a tetrafluoridoborate counter-anion and solvating dichloromethane, [Ir(C8H12)(C7H13N3)(C18H15P)]BF4·1.5CH2Cl2, is reported. The IrI center
Aaron Maynard, Michael Gau, Daniel R. Albert, Edward Rajaseelan   +3 more
doaj   +1 more source

N‐Heterocyclic Carbene Organocatalysis: With or Without Carbenes?

Chemistry – A European Journal, 2020
AbstractIn this work the mechanism of the aldehyde umpolung reactions, catalyzed by azolium cations in the presence of bases, was studied through computational methods. Next to the mechanism established by Breslow in the 1950s that takes effect through the formation of a free carbene, we have suggested that these processes can follow a concerted ...
Sascha Gehrke, Oldamur Hollóczki
openaire   +2 more sources

Unprecedented directed lateral lithiations of tertiary carbons on NHC platforms [PDF]

, 2015
International audienceUnexpected and unprecedented directed remote lateral lithiation at one CH(CH3)2 of the 3-(2,6-di-isopropylphenyl) wingtip took place upon the reaction of functionalised N-heterocyclic carbene-type molecules with excess of LiCH2SiMe3,
Braunstein, Pierre, Danopoulos, Andreas A., Frison, Gilles, Rezabal, Elixabete   +3 more
core   +3 more sources