Results 41 to 50 of about 36,419 (269)

Chelated Ruthenium Catalysts for Z-Selective Olefin Metathesis [PDF]

, 2011
We report the development of ruthenium-based metathesis catalysts with chelating N-heterocyclic carbene (NHC) ligands that catalyze highly Z-selective olefin metathesis.
Endo, Koji, Grubbs, Robert H.
core   +3 more sources

Diazo Transfer From Nitrous Oxide Employing Phosphorus Ylides

Angewandte Chemie, EarlyView.
A phosphorus ylide‐mediated strategy achieves the direct fixation of nitrous oxide (N2O) to access diazo compounds, which after intra‐ or intermolecular trapping, afford N2‐containing organic building blocks. This approach provides an alternative to hazardous diazo‐transfer reagents and establishes N2O fixation as a sustainable methodology.
Jhen‐Kuei Yu, Jan Niclas Ludwig, Patrick Wolf Antoni, David Tymann, Max Martin Hansmann   +4 more
wiley   +2 more sources

1,3-Bis(4-methylbenzyl)imidazol-2-ylidene silver(I) chloride catalyzed carboxylative coupling of terminal alkynes, butyl iodide and carbon dioxide

Journal of Saudi Chemical Society, 2017
The N-heterocyclic carbene silver(I) complex 1,3-bis(4-methylbenzyl)imidazol-2-ylidene silver chloride was applied as the effective catalyst for the three-component carboxylative coupling of terminal alkynes, butyl iodide and carbon dioxide. The reaction
Zhi-Zhi Zhang, Rui-Jie Mi, Fang-Jie Guo, Jing Sun, Ming-Dong Zhou, Xiang-Chen Fang   +5 more
doaj   +1 more source

N-Heterocyclic carbene-based C-centered Au(I)-Ag(I) clusters with intense phosphorescence and organelle-selective translocation in cells

Nature Communications, 2022
Photoluminescent gold clusters have unique chemical and physical properties based on their perturbed electronic structures. Here, the authors report the synthesis of carbon-centered Au(I)-Ag(I) clusters with high phosphorescence quantum yields using N ...
Zhen Lei, Mizuki Endo, Hitoshi Ube, Takafumi Shiraogawa, Pei Zhao, Koichi Nagata, Xiao-Li Pei, Tomoya Eguchi, Toshiaki Kamachi, Masahiro Ehara, Takeaki Ozawa, Mitsuhiko Shionoya   +11 more
doaj   +1 more source

Conformations of N-Heterocyclic Carbene Ligands in Ruthenium Complexes Relevant to Olefin Metathesis [PDF]

, 2009
The structure of ruthenium-based olefin metathesis catalyst 3 and model π-complex 5 in solution and in the solid state are reported. The N-tolyl ligands, due to their lower symmetry than the traditional N-mesityl substituents, complicate this analysis ...
Benitez, Diego, Day, Michael W., Goddard, William A., III, Grubbs, Robert H., O'Leary, Daniel J., Stewart, Ian C., Tkatchouk, Ekaterina   +6 more
core   +3 more sources

Sulfur‐Directed Construction of Vinyl Cyclopropanes from 1,3‐Dienes

Angewandte Chemie, EarlyView.
Sulfur takes control. A pending thioether acts as a molecular compass, directing carbene addition to the 1,3‐diene scaffold with exceptional regio‑ and diastereocontrol to forge sulfur‐substituted vinyl cyclopropanes (S‐VCPs) — molecular architectures inaccessible via conventional cyclopropanation strategies.
Anna Keimer, Jonas Rettig, Tim‐Niclas Streit, Bob Barthel, Mélissa Calmels, Moritz Malischewski, Franz‐Lucas Haut   +6 more
wiley   +2 more sources

Efficient electrocatalytic acetylene semihydrogenation by electron–rich metal sites in N–heterocyclic carbene metal complexes

Nature Communications, 2021
This study explores N–heterocyclic carbene copper complexes toward selective electrocatalytic reduction of acetylene to ethylene. The electron–rich copper sites were found to facilitate acetylene adsorption and ethylene desorption and achieved high ...
Lei Zhang, Zhe Chen, Zhenpeng Liu, Jun Bu, Wenxiu Ma, Chen Yan, Rui Bai, Jin Lin, Qiuyu Zhang, Junzhi Liu, Tao Wang, Jian Zhang   +11 more
doaj   +1 more source

Flexible cycloalkyl-substituted N-heterocyclic carbenes

Dalton Transactions, 2010
The use of two metal systems cis-Pt(NHC)(2)Me(2) and cis-Ir(NHC)(CO)(2)Cl help to highlight the flexibility of a series of cycloalkyl-substituted N-heterocyclic carbene ligands (ICy, ICy(7), ICy(8), ICy(12)). Bond dissociation enthalpies of several N-heterocyclic carbenes (NHCs) in cis-Pt(NHC)(2)Me(2) are estimated.
Fortman, G. C.; Slawin, A. M. Z.; Nolan, S. P.   +3 more
openaire   +2 more sources

Chlorido[(1,2,5,6-η)-cycloocta-1,5-diene](1-ethyl-4-isobutyl-1,2,4-triazol-5-ylidene)rhodium(I)

IUCrData
A new neutral triazole-based N-heterocyclic carbene rhodium(I) complex [RhCl(C8H12)(C8H15N3)], has been synthesized and structurally characterized. The complex crystallizes with two molecules in the asymmetric unit.
Timothy G. Lerch, Michael Gau, Daniel R. Albert, Edward Rajaseelan   +3 more
doaj   +1 more source

Mercury(II) Complexes of Anionic N-Heterocyclic Carbene Ligands: Steric Effects of the Backbone Substituent

Molecules, 2020
Mercury(II) complexes (Me-maloNHCDipp)HgCl (1b), (t-Bu-maloNHCDipp)HgCl (2b) and (t-Bu-maloNHCDipp)HgMe (2c) supported by anionic N-heterocyclic carbenes have been obtained in good yields from the reaction of the potassium salt of N-heterocyclic carbene ...
Chandrakanta Dash, Animesh Das, H. V. Rasika Dias   +2 more
doaj   +1 more source